Seltzer, Charles Alden: The Boss of the Lazy Y. v1. 3 Mar 2014
 

Charles Alden Seltzer (15 August 1875–9 February 1942) was an American writer. He was a prolific author of western novels, had writing credits for more than a dozen film titles, and authored numerous stories published in magazines, most prominently in Argosy.

Excerpt
Shuffling down the long slope, its tired legs moving automatically, the drooping pony swerved a little and then came to a halt, trembling with fright. Startled out of his unpleasant ruminations, his lips tensing over his teeth in a savage snarl, Calumet Marston swayed uncertainly in the saddle, caught himself, crouched, and swung a heavy pistol to a menacing poise.