Here we go again, with this Fairy Tale Spamming. William T. Anderson died in 1864, move on and quit spamming serious research boards with this crap!
This was resolved in 1924 and recapped in the following 1938 article.
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July 4, 1938 Richmond Missourian newspaper:

WAS ANDERSON KILLED?--The question was raised a few years ago by a Texan who alleged that Captain Bill Anderson was not killed at the battle of Old Albany, the old man claiming that Anderson lived for many years after the 1864 fight.

Jewell Mayes, inquiring in the interest of historic facts, listened to the late Captain Clayton Tiffin of Knoxville, Mo., later of Hamilton, Mo., talk about his Civil War experiences as a Federal Captain as friendly toward the families of Confederate soldiers as he dared to be under the limitations of civil war.

Captain Tiffin had contacted Captain Anderson personally when he, Tiffin, was captured at Glasgow. Captain Tiffin was in front of the courthouse in Richmond when the body of Captain Bill Anderson was brought into town--he identified the body and the horse, being positive beyond shadow of a doubt that it was Anderson. Lieutenant Thomas Henkins was the first man of record who definitely identified Captain Anderson found lying dead on the battle field.

Jim Cummins, a Confederate and fellow soldier with Captain Anderson, told Jewell Mayes that Anderson’s sisters at all times recognized that their brother was killed at Albany, and that they appealed to him to raise money for a monument in the Old City Cemetery in Richmond.

Cole Younger told Jewell Mayes that there was no doubt in the minds of his fellow soldiers that Anderson was killed at Old Albany, and that his passing was recognized as a serious loss to the Southern cause.

DEATH MASK PICTURE--Photographer Hicks, who later located in Liberty, Mo., took the photograph of the dead man, and his picture was recognized by relatives and personal friends as that of the dad Captain Bill Anderson. The late W. Earle Dye owned a copy of the original print of the Anderson picture.
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BTW: Jewell Mayes was the Sec. of Agriculture for the State of Missouri and a cousin of W. Mayes, publisher of the Brownwood Bulletin and boss of Henry C. Fuller, the discredited reporter that interviewed Uncle Billy Anderson of Brown County Texas and wrote that ridiculous fairy tale.

DM