Wayne Banks' 1959 History of Yell County, Arkansas quotes a passage from the diary of William D. Callan, Co. D, Nw 15th Arkansas Infantry. Banks also indicates that he had interviewed or spoken with Callans son, Monroe. Does anyone know whether the diary still exists, original or archived copy? I am searching for any primary sources (letters and diaries especially) on this unit for inclusion in a regimental history. Thanks, Robert