Perhaps some of this will be of help to you in your research of the 17th Texas Dismounted Cavalry:

From: Compiled Service Records

Col Moore’s regt-Org 3/15/62 reorg 5/22
2nd co I formerly co K 14 Tx Inf
Formerly co L 18 Tx Inf

Organized & accepted into the CSA 3/15 with 10 co's and reorg 5/22 w/9 co's
1st co I being transferred to 28 Tx Cav April 22
2nd co I came to this regt soon after 10/31/62 muster

Col Moore
3/15-elected from ranks of co A
Relieved from duty 5/24

Col Taylor-promoted Col 5/22-Little Rock-to rank from 4/16
Captured Ark Post
4/29/63 forwarded to City Point for exchange

Fourteen hundred and ninety one days in the Confederate Army.
W P Lane Rangers

http://lcweb2.loc.gov/cgi-bin/ampage?collId=rbc3&fileName=rbc0001_2008rare02842page.db&recNum=186
11/27/62Steamer Julia Roan passed down with Col Taylor’s regt on board

http://www.sutphen.org/documents/warletters/warletters.htm

The Sutphen Civil War Letters
Most of these letters were written by William Crisman Sutphen to his wife, Sarah Wilson Oxsheer Sutphen during the Civil War. William died of measles in Pine Bluff, Arkansas (near Little Rock) in 1862 while serving in the Confederate Army, 17th Dismounted Cavalry Regiment (Moore's Regiment), Company H. The letters were handed down to the descendants of George Ellmore Sutphen, William and Sarah's only surviving child.

HOUSTON] TRI-WEEKLY TELEGRAPH, June 9, 1862, p. 1, c. 5
Camp near Little Rock, }
May 23, 1862.
Editor Telegraph: Col. Moore's Regiment, the 17th Texas Cavalry, arrived here on the 20th.
Little Rock, I find, is built after the fashion of other towns in the South-west, and at this time presents a very dilapidated appearance. Business, other than that done in the military line, is entirely suspended. The inhabitants of the place got scared at our near approach and prevailed upon Gen. Roan, who commands the Department of Arkansas, to declare martial law, very much to the regret of the troops. Per consequence, the "places where gentlemen most do congregate" are all closed, and it is only by a display of the most extraordinary talent that the non-commissioned and privates can obtain any—the least taste—of anything like spiritous or vinous liquors. However, sich is life. . . .
I must not forget to make honorable mention of the kind treatment we received on our march. To the ladies of Shreveport, La., especially Capt. Nobles' company, is under lasting obligations. In an incredible short space of time they made tents for our entire company. Those of our sick who were left there will never forget the attention shown them. Among those who are most deserving of notice, is Col. Watson and his excellent family. What they did was done in an unpretending christian spirit, and worthy of the highest emulation. If we could always be among such a people, so generous, and kind, and true, the hardships of a soldier's life would sit but lightly upon him.

Other sources:
http://cwba.blogspot.com/2012/03/lundberg-granburys-texas-brigade.html
Granbury's Texas Brigade: Diehard Western Confederates by John R. Lundberg

http://www.lib.utexas.edu/taro/utcah/02045/cah-02045.html
Chambers, E. W., diary
The E. W. Chambers Diary, [ca. 1857]-1956, chronicles the daily military life of Elijah Windsor Chambers during his service in Captain John W. Kolfus’s company of the 16th Texas Cavalry Volunteer Regiment in the Confederate Army during the Civil War. The diary also contains writings by J. Milton Houston, [ca. 1857], as well as a listing of Chambers family births and deaths from 1810 to 1956. Additionally, the collection includes a transcript of the diary, transcripts of letters from Chambers to his sister Elizabeth Bryan, 1862-1863, as well as photocopies of military records and a family photograph.

http://www.ozarkscivilwar.org/archives/4746
Peter Wellington Alexander Papers
excerpts from my personal notes from The Alexander Papers:
7/10/62 Little Rock-General Hindman issues Spec Order # 26-The extreme scarcity of forage renders it an impossibility to maintain a large mounted force, without causing distress, if not actual starvation, among the troops and poorer people of the country; therefore all cdrs of companies and Regts of mounted men, now en route to these Headquarters from Southern Ark and Tex, upon seeing this order, are required to dismount their men before proceeding farther, and send the horses with suitable details home, and move forward as Inf. This order applies to those commands which have been heretofore formally accepted, as well as to others. The imperative necessity of the case admits of no exception whatever, and it is hoped that a proper degree of patriotism will ensure a ready obedience.

7/10/62 Gen Hindman to Gen Rust, Brownsville, Ark-...barely enough corn in the country for bread for the troops half rations for the Btry and wagon animals. I have to choose between starving the men or reducing our excessive Cav force and the latter must be done. We can’t afford above a sqdrn of mounted men to a Bgde. Act promptly and dismount the excess of Cav at once.

The following are from the archives of Jim Martin's message board:
Re: Vontree's Texas cavalry
Posted By: Doug Bright
Date: Sunday, 31 July 2005, at 9:04 a.m.
In Response To: Re: Vontree's Texas cavalry (Doyle Taylor)
Doyle-Here are portions of the dispatches from Parson's I found from"In the saddle with the Texans":
Special Order No 5-June 3 1862
"Col.[James R.] Taylor of the 17 Texas Cavalry & commanding detachment in Searcy Valley at once take position to cover & protect the opperations of the citizens of the valley in removing their corn and bacon [to]South Des Arc Bayou."
Special Order No.7-June 4 1862
"Col.[James R.] Taylor comdg detachment of the advance in Searcy Valley will promulgate this Official Order to wit-"
ect.ect.ordering citizens of Des Arc Bayou to move their corn and bacon south of "Quarles" on the "Searcy and Austin" roads...
Special Order No.11-June 4th 1862
"Major [John]McClarty commanding detachment of [James R.]Taylors 17th Tex. Cav. at Austin will bring every available man in his command & all commissary stores in his possession."

An excerpt from "Campaign in Arkansas-Battle of Cotton Plant-Gallantry of the Texians Camp on Bayou Metoe Near Brownsville Arkansas,July 22, 1862(printed in Houston Tri-Weekly Telegraph,August 6,1862)"
"...established headquarters in Searcy in White county...Col.Parsons was ordered in command of his regiment, with [James R.]Taylor and William Fithughs regiments of Texas Cavalry to cross over.."(the "Little Red") "He pressed rapidly forward,leaving a portion of Taylor's regiment at the ford; then with our regiment and an advance of 100 men under Taylor, followed after the Federal.After 12 miles north of Searcy, Col. Taylor engaged them and reported to Col. P, who promptly formed line of battle and fell uopn their flank. The enemy soon gave way and rushed, panic stricken, from the field."
Not soon after this the 17th Texas was dismounted and the horses sent home for want of forage and eventually found themselves along with the 15th and 18th reg.s in the ditches at Arkansas Post.

Posted By:
Jim Martin (Webmaster)
Date: Monday, 19 July 2004, at 12:01 p.m.
In Response To: 17 Texas Cavalry, Co K (edie youts)
Edie,
Here is a short history of the 17th Texas Cavalry written by one of its members:
SEVENTEENTH TEXAS CAVALRY.
The 17th Texas Volunteer Cavalry, Confederate Army, was organized early in 1862 and ordered to Corinth, Miss. In the meantime a Federal army was invading Arkansas from Missouri. Our orders were changed to meet it. We met the advance of said army and turned it back. By the middle of
July, 1862, our horses were run down and we were dismounted the 16th of July. Our first hard-fought battle was on the 11th day of January, 1863, beginning on the 10th. In this battle we were surrendered, nine Texas regiments in all surrendering at the time. Enough of us escaped after the surrender to make eight companies. In the early part of spring we reorganized with the title of "The Seventeenth Texas Consolidated Regiment." James R. Taylor was made Colonel. We lost our flag in the engagement of January 11, 1863 (Arkansas Post), and this flag was made and presented to our regiment by a Miss Watson, two miles west from Shreveport on July 6, 1863. Its first engagement was Vida¬lia, La., in February, 1863. The next at Harrisburg, La., in the same month. The next Mansfield, La., April 8, 1864. The next Pleasant Hill, La., April 9, 1864. Next Marks¬ville, La., May 16, 1864; next Yellow Bayou, La., May 18, 1864, which was our last regular engagement. The under¬signed received the flag from the hands of Miss Watson and was Regimental Ensign to the close of the war.
E. W. H. PARKER.

Posted By: clyde burns
Date: Saturday, 9 April 2005, at 1:57 p.m.
Athens Weekly Review
Feb. 6, 1903
Dallas News.
Athens, Texas, Jan. 16--Your correspondent learned incidentally that Rev. E. W. H. Parker, a Baptist minister now living in Athens, was the color - bearer of a Texas regiment during the Civil War and that he had still in his possession the flag which he then carried. I asked the privilege of seeing and inspecting the flag which was kindly granted, and this blood - stained, battle - marked memento of that great fratricidal strife is now in my possession temporarily. It is tattered and torn, but shows superior handy work and this it was made of the finest material. Thirteen stars are set in two blue bars which cross at right angles on a red or pink square as background at top (part of the page is missing) The rest of the flag is white or cream silk. It is about seven feet long. It has bullet holes in it and has blood stains on it which were splattered on it when six men were killed near it by an exploding shell.
Mr. Parker was asked its history, whereupon he handed me the following sketch:
The 17th Texas Volunteer Cavalry, Confederate Army was organized early in 1862 and ordered to Corinth, Miss. In the meantime a Federal army was invading Arkansas from Missouri. Our orders were changed to meet it. We met the advance of said army and turned it back. By the middle of July 1862 our horses were run down and we were dismounted the 16th of July. Our first hard - fought battle was on the 11th day of January 1863, beginning on the 10th. In this battle we were surrendered, nine Texas regiments in all surrendering at the time. Enough of us escaped after the surrender to make eight companies. In the early part of spring we reorganized with the title of "The 17th Texas Consolidated Regiment," James R. Taylor was made colonel. We lost our flag in the engagement of Jan. 11, 1863, (Arkansas post) and this flag was made and presented to our regiment by a Miss Watson, two miles west from Shreveport in July 6, 1863. Its first engagement was Vidalia, La., in February 1865. The next at Harrisburg, La, in the same month. The next Mansfield, La., April 8, 1864. The next Pleasant Hill, La., April 9, 1864. Next Marksville, La., May 16, 1864; next Yellow Bayou, La., May 18, 1864, which was our last regular engagement. The undersigned received the flag from the hands of Miss Watson and was Regimental Ensign to the close of the war. E. W. H. Parker.
Transcribed by Bunny Shumate Freeman Feb. 8, 2002

[HOUSTON] TRI-WEEKLY TELEGRAPH, June 9, 1862, p. 1, c. 5
Camp near Little Rock, }
May 23, 1862.
Editor Telegraph: Col. Moore's Regiment, the 17th Texas Cavalry, arrived here on the 20th.
Little Rock, I find, is built after the fashion of other towns in the South-west, and at this time presents a very dilapidated appearance. Business, other than that done in the military line, is entirely suspended. The inhabitants of the place got scared at our near approach and prevailed upon Gen. Roan, who commands the Department of Arkansas, to declare martial law, very much to the regret of the troops. Per consequence, the "places where gentlemen most do congregate" are all closed, and it is only by a display of the most extraordinary talent that the non-commissioned and privates can obtain any—the least taste—of anything like spiritous or vinous liquors. However, sich is life. . . .
I must not forget to make honorable mention of the kind treatment we received on our march. To the ladies of Shreveport, La., especially Capt. Nobles' company, is under lasting obligations. In an incredible short space of time they made tents for our entire company. Those of our sick who were left there will never forget the attention shown them. Among those who are most deserving of notice, is Col. Watson and his excellent family. What they did was done in an unpretending christian spirit, and worthy of the highest emulation. If we could always be among such a people, so generous, and kind, and true, the hardships of a soldier's life would sit but lightly upon him.
I will write you again when something new or interesting transpires. Until then adois [sic].

Posted By: Charles Temple
Date: Saturday, 22 April 2006, at 6:42 p.m.
In Response To: Re: 17 Texas Cavalry, Co K (Jim Martin (Webmaster))
My g-grandfather, M.D.L. Price served in Co. C, 17th Texas Cavalry, and I have done a great deal of research on this regiment. Please understand that there were actually two 17th Texas regiments. The original was recruited by Col. George Moore at Tyler, Texas in Feb 1861, served in Arkansas, where many died of disease. Most of the unit was captured at Arkansas Post in Jan. 1863. (Very few were wounded or killed in this battle) Some 17th troops escaped capture and were reformed into the 17th Texas Consolidated Regiment, which served mostly in Louisiana. The captured men from the 17th were briefly imprisoned at Camp Douglas, Chicago, Illinois,(where many more died of disease) then were exchanged at City Point, Virginia in May, 1863. They retained the original 17th Texas Cavalry (Dismounted) designation and were assigned to Deshler's/Granbury's Brigade, Army of Tennessee and served with great distinction in that organization for the remainder of the war.
The best individual history of the unit I have found is This Band of Heroes by James M. McCaffrey
Good luck with your research, and please don't hesitate to contact me if I can help.