Herbert Ball Crosby was a soldier and later, police commissioner.
About 1894 JW received a letter from a Miss Crosby who had, according to JW, a brother who was a soldier, but clearly he never met JW.
This may have been Herbert Ball Crosby, who graduated from the US Military Academy at West Point in the class of '93, on 12 June 1893. After serving in Cuba and in the cavalry he retired in 1930 and became a police commissioner in DC.
Cullum Memorial Edition, Register of Graduates and former cadets, United States Military Academy, West Point, 1980, no. 3538.