Yep. I can practically walk to his old ranch from my office. Some other Jeffries-Burbank related items I have:
7.5" x 9.5" [10" x 12" mount] mounted photo of Jim Jeffries on his farm in Burbank with his pup, with a handwritten copyright of 1906 By Jas. J. Jeffries and Jas. M. Johnson [perhaps the photographer], captioned "The Good Friends" in pencil on the mount. Purportedly from his estate.
An invite to Jim Jeffries' 75th birthday party, sent to the Stewerts, who were close friends. Mr. S was the manager of the boxing arena in Ontario, CA.
Inside of the cover from a 1941 edition of The Knockout showing Jeff on the farm:
A GPC invitation and the only two known tickets from the dinner referenced in the text of the previous item:
