Lonesome Dove, Volume 2: Comanche Moon by Larry McMurtry

CALL HAD NO TROUBLE persuading Famous Shoes to help them find Blue Duck's camp. Famous Shoes liked to be free to go anywhere at any time, across the plains, into the forests, down to Mexico, over the mountains. The Kickapoo people were widely scattered now-he had to be able to move freely in order to visit his own people. Recently, though, because of Blue Duck and his renegades, he had had to recognize that it was unwise to travel north of the Trinity River, unless he went very far to the west to do it. Famous Shoes did not want to get killed, and he knew that Blue Duck would kill him without hesitation if he found him alone. He well remembered that Blue Duck had once delivered him to Slow Tree, thinking he was delivering him to torture. Slow Tree had let him go, but Blue Duck would not let him go if he caught him now.

So when Captain Call came to him and said that the rangers were going after Blue Duck, Famous Shoes immediately made ready to go with them.