A book by William Hornaday - the author of "Campfires in the Canadian Rockies" - about a November 1907 expedition from Tucson to the Gulf of California. The book includes travel details, discussions of the plants, animals and terrain, photos and maps. Also notable is that the expedition includes Tucsonans Dr. Daniel Trembly MacDougal and Godfrey Sykes.

The PDF is available from Arizona Memory Project.