For those interested, here is Britt's entry in Vol. XII of the NC Troops Roster Series:
Co. E, 51st Regiment, N.C. Troops
Britt, Calvin C., Private
Resided in Robeson County and was by occupation a farmer prior to enlisting at Charleston, South Carolina, at age 31, March 9, 1863, for the war. Present or accounted for until killed at Drewry's Bluff, Virginia, May 14, 1864.