Cover image not available
v. 1. November 20, 1872-July 28, 1876
v. 2. July 29, 1876-April 7, 1878
v. 3. June 1, 1878-June 22, 1880
v. 4. July 3, 1880-May 22, 1881
v. 5 May 23, 1881-August 26, 1881.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The diaries of John Gregory Bourke by John Gregory Bourke. ISBN 9781574414813. Published by University of North Texas Press in 2003. Publication and catalogue information, links to buy online and reader comments.