Statistics for occurrence #1 of “J. A. Derrick” in chapter 10 of Brigadier-General Ellison Capers, Confederate Military History, a library of Confederate States Military History: Volume 5, South Carolina:

...ieut. J. C. Lovelace were wounded. In the Eighth most of the casualties were met while the regiment was taking position and exposed to the enemy's view. In the Fifteenth, Lieuts. B. P. Barron and J. A. Derrick were wounded. Of the general staff, Adjt.-Gen. C. R. Holmes, Lieut. A. E. Doby, Lieut. J. A. Myers and Lieut. W. M. Dwight were specially mentioned. Doby's gallant and efficient conduct in dire...
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