The entry is from Marmadukes Trans-Mississippi Order book. I have no idea if there is more info included or whether its just a casualty listing (most likely). However it does tie down his unit a bit further.
Per Jim McGhee's "Guide to Missouri Confederate Units" pg 69
"A detachment from the battalion, led by Lt Col John M. Wimer, rode with Porter into Southwest Missouri in January 1863 as part of Brig. Gen. John S Marmaduke's raiding force. During the raid, the battalion fought at Hartville on January 11, where Wimer was killed and 9 men wounded...."
I also think this service card is his as well
which places him in Moses Beck's Missouri Defenders a Missouri State Guard Unit from 1861 to 1862 a Cavalry Unit in the Second Division.
Goodspeed's 1889 history of Wright county etc.. is remarkably silent on the affair, though spends several pages listing the names of men who served the Union.
"With Porter in North Missouri" by Joseph A Mudd beginning Chapter 27 describes the action around Hartville in Januray of '63 in some detail including the movements of Burbridge's detachment. Marmaduke reports establishing a field hospital at Hartville. Porter's report (not his own as he too was seriously wounded) reports the dead of his unit being buried on January 11th near Hartville. (the tone of the report leads one to believe this was a mass burial).
Britton in his 1899 book "The Civil War on the Border" pg 464 indicates Marmaduke encamped the night of January 11th "... seven miles southeast of Hartville in an open prairie, leaving his dead and severely wounded on the field. The next morning, after sending, under flag of truce, a letter to the Federal commander concerning the care of the Confederate wounded and the interment of his dead, he continued his retreat south into Arkansas, and crossed White River near Batesville."
This site reports that the dead were buried in the Hartville Cemetery now known as the Steele cemetery. At least 25 of the confederate dead were identified by the SCV when a marker was placed in the cemetery. This was a mass burial consistent with "Porter's" report (I put in quotes, because it is attributed to him but not written by him) as recorded by Mudd.
http://www.rootsweb.ancestry.com/~mowright/Memorialpage1.html
As the actions of Moore's unit spanned essentially 3 days and clearly the most severe of the fighting occured on Jan 11th, I presume he may have died on the way back to Arkansas but it appears that most of the wounded by contemporanous reports were left on the field of battle or in or near Hartville itself. We'll likely not know for sure where he is buried.
Hope this helps, if not it's been interesting reading about the Battle of Hartville in the least.
John R.