Sign of the Hawk — Max Brand

The stallion Sedgewick is considered a man-killer, in "The Singular Horseman". He belongs to Elena Casimir-Jones, and she absolutely refuses to have him destroyed. Dyke Vincent, a young rider frustrated with all the talk about Sedgewick, sets out to ride the stallion and prove everyone wrong.
In "Sign of the Hawk", a hawk made of feathers is left pinned to Handsome Harry Delancey's unconscious victims. No one knows him, and no one can find him - with the exception of Li Wo, who raised him. By night Delancey is an outlaw, and by day Ching Wo is a pious Chinese youth. He has never seriously harmed anyone while taking their money. But when Li Wo learns that Malcolm Foster, a former ship's captain, is coming to the area, he asks his son to commit murder.