I could not find meaning of these words.Can you?
"Santa's father," explained Webb gently, "got her to promise that she wouldn't write to me or send me any word. That heart-and-cross sign was her scheme. Whenever she wanted to see me in particular she managed to put that mark on somethin' at the ranch that she knew I'd see. And I never laid eyes on it but what I burnt the wind for the ranch the same night. I used to see her in that coma mott back of the little horse-corral."

Edit: I found the same word in another O.Henry story, so it's not a misprint. Also seemed to me a small place or area. A Spanish dictionary gave Spanish "coma" = English "coma" , no defintion of mott.