Private Spear Grillett, Company D, 3rd Louisiana Infantry was wounded June 10, 1863 in the trenches, Hebert's Brigade. At the time, his regiment was occupying the siege line at a position called the 3rd Louisiana Redan, on the Jackson Road. During this period of time, a Yankee Sharpshooter, "Coonskin" Henry C. Foster of the 23rd Indiana, had build a tower, which was high enough that he could see into the Redan. He along with his comrades killed and wounded a number of Louisianans. [The Vicksburg Campaign, V. III, Edwin C. Bearss, Morningside, 1986, p. 911]

His file shows correspondence between the Adjutant General, War Department with the Board of Pension Commissioners, Baton Rouge, La. regarding his service, dated April 15, 1922. This would signify either he or his widow filed for a Confederate pension.