The same year he joined the Rangers the 19yo Gillette nearly shot 16yo Herman Lehmann. IIRC the Rangers had taken an educated guess at where the Apaches were headed and ridden through much of the night, surprising the Apaches in the morning.
Lehmann was mounted behind an Apache friend, the two riding two-up, their horse lagging behind. Gillett dismounted and shot the horse with his Winchester rifle (my own contention is, never mind revolvers, rifles had it all over handguns in plains combat).
If I recall correctly, both Lehmann and his friend escaped.
I bought it as an ebook on Amazon several years ago. It was on sale for like $2.95. Good read.
"Allways speak the truth and you will never have to remember what you said before..." Sam Houston Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"