BLUE MASK STRIKES AGAIN

I had begun to go stale on John Mannering, alias Blue Mask, but this one has plenty of new quirks, new perils, new problems and new solutions. So anyone who doesn't know his Blue Mask techniques will find it fascinating, and those who do will find it a good one. More jewel problems, faking, theft, et al; and a bit of dope smuggling on the side. This time Mannering works with the police, at least in part.