Handwritten and signed letter, dated 24 Oct. 1894, and addressed to Barton O. Aylesworth. Ballou writes about where biographical information can be found on him. Also included is a printed list of works by Ballou with handwritten additions and the envelope in which the letter was sent.

Handwritten and signed letter, dated 14 Dec. 1901, and addressed to Barton O. Aylesworth of Fort Collins, Colorado. Bruce responds to Aylesworth's request for biographical information. Also included is the envelope in which the missive was sent, a biography of Bruce clipped from a magazine, a list of addresses given by Bruce, and also a list of his books.

Two handwritten and signed letters, dated 28 Oct. 1894 and 24 Jan. 1895, and addressed to Barton O. Aylesworth. Burnham responds to questions related to her life and publications. Also included are the envelopes in which the letters were sent, three portraits of Burnham clipped from magazines, a biography of her cut from a newspaper, and a printed list of Burnham's books.