A.C. Henderson

When Colt kills the men that murdered his father, he escapes his pursuers and joins Wolf and his outlaw gang. After two years Wolf breaks up the gang, deeds his ranch to Colt, and turns himself in. Now an honest rancher, things are going fine for Colt until Wolf's old gang shows up under a new leader. Colt get the Governor to release Wolf claiming the two of them can bring in the gang.

A valuable gem from India is stolen in an old dark mansion and it is up to Scotland Yard inspector Charles Irwin to find out who did it among all the suspects who were in the house.