"The+million+dollar+collar"
The Million Dollar Collar
Bill Holmes rescues Rinty from a car wreck not realizing that there is a stolen $50,000 diamond necklace hidden in the dog's collar.
The Ballad of Hector the Stowaway Dog
Dog of an officer of the merchant navy, Hector wanders during a stopover in Lisbon. Captured by smugglers, he was soon used as a mule in a case of diamond smuggling. But this is not counting on his innate sense of justice and law...