A James J. Stone was born in Irwin County, Georgia in 1828. He enlisted in Company C, 50th Ga Inf Regt, on March 4, 1862. He was wounded at Gettysburg on July 2, 1863. He was later listed as AWOL on the February 1865 muster roll. He was paroled in Thomasville, Georgia on May 17, 1865. In 1904, Stone filed for a Confederate Service Pension in Colquitt County, Georgia. His pension record says he was at home on sick furlough in Colquitt County at the end of the war. The latter could have been correct because the records near the end of the war were not very good. Many men who were on furlough were shown as AWOL because they couldn't get back to their unit due to enemy troops between them and their unit, etc.
No record in his compiled service record of losing a leg at Gettysburg. If he moved to Arkansas in 1866, he must have moved back to Colquitt County by 1904, assuming it is the same James Stone. Very likely it was. You can obtain a copy of his service and pension records at either the Georgia or Florida Archives.
There is also a William Stone in Company C. He was wounded at Chancellorsville and Cold Harbor. He filed for a CSP in Colquitt County in 1905. Could that have been James' brother? Another William Stone, Company A, was wounded at Gettysburg in the left ankle and side. He later moved to Florida and filed for a CSP in Baker County, Fl.
Hope this helps.