There was a similar claim in Samuel Shannon's obituary in the Van Buren County [Arkansas] Democrat, March 1915.
Terminating a residence of more that forty years in this county, "Uncle" Sam Shannon, one of Choctaw township's oldest and best known citizens, died Wednesday night, March 10, 1915, aged 72 years.
"Uncle Sam" was born in South Carolina October 28, 1842, moving to Georgia during his boy-hood days. At the age of twenty six years, or on October 29, 1868 he was married to Miss Sallie Knight, and with whom he soon thereafter emigrated to Arkansas, locating in the Choctaw Township.
In 1861 when his horizon was darkened by the war cloud, "Uncle Sam", true to his nativity, shouldered his musket and no better demonstration of southern patriotism was ever exhibited. During his four years of service he participated in twenty-seven hard fought battles, the most notable of which perhaps was Murfreesboro, and the skirmishes incident to the defense of Richmond in the "Two great campaigns against Richmond". During the last campaigns, in the battle of Chancellorsville, he was on picket duty and witnessed the killing of Stonewall Jackson.
In August, 1912, he feeling the weight of a man's sins, and desiring to lean upon the strong arm of Jesus, joined the Christian Church and thereafter lived a true Christian life. During his long residence in the township he was known and recognized by all as a good man.
Almost three years of intense suffering was endured by him previous to his departure which came in answer to his supplications. Interment took place at the Huie Cemetery, March 11, 1915. Reverend Loftis officiated.
Children of Sam and Sallie Knight Shannon were Robert, Tom, John, Ellen, Lizzie, Rose and Nancy

Was the 19th Georgia at Chancellorsville? Yes.
Were they in the vicinity? Depends on what you mean. A.P. Hill's Division would have been in the front line. Jackson was in front of Lane's Brigade, probably the 18th N.C. regiment. The 19th Georgia was with Colquitt's Brigade in the second line with Rodes' Division. Call it a mile away from where Jackson was shot.
Was the 19th Georgia at Murfreesboro, as claimed in the obituary? No.

George