I found your query of two years ago at:

http://history-sites.com/cgi-bin/bbs62x/txcwmb/webbbs_config.pl?md=read;id=13476

I believe Camp Sidney Johnson in 1864 was in Chambers County, Texas.

I believe Pittsville, Tex. was just north of Houston.

Shortly after the end of the Red River Campaign, the Thirty-Sixth Texas Cavalry returned to eastern Texas, It served at various locations there until early in 1865. Ordered to Galveston, it served as garrison for that city and on Provost duty.

Unlike most Civil War units in Texas, the Thirty-Sixth Texas Cavalry was actually in the city of Galveston when the surrender was agreed upon. The regiment was paroled at Galveston in early June, 1865.

It was at Crockett, Texas the end of February, 1865