If your Mr. McCurdy was a Mississippi Confederate soldier, then he must have been one of the following,

McCurdy, James A; Pvt, Company Hl 40th Regt. Infantry
McCurdy, Miles; Pvt, Company F, 20th Regt, Infantry
McCurdy, Samuel; Cpl; Company D; 44th Regt. Infantry
McCurdy, W.C.; 1st Sgt.; Company G; 22nd Regt., Infantry
McCurdy, William; 3rd Lt., Capt.;Companies A and K; 37th Regt. Infantry
McCurdy, William C.; Sgt., Company I, 33rd Regt., Infantry
McCurdy, William R.; Pvt.; Company H, 40th Regt., Infantry

Again, good luck in your search.