Werner Alfred Waldemar von Janowski, (Abwehr-codenamed "Bobbi"; Allied-codenamed WATCHDOG), was a German Second World War Nazi spy and the Royal Canadian Mounted Police's first double agent.

The son of the hotel owner, Earle Annett Jr., grew suspicious of him, due to inconsistencies with the German spy's story.

Annett also noticed that he spoke English with a Parisian accent, his clothing had European styling, and that he paid for his cigarettes with an obsolete Canadian dollar bill that had not been in circulation for quite some time.

[5] The stranger also had a strange smell on him; he was using Belgian matches that did not carry the Canadian government seal that was applied to matchbooks at the time.

"[4] Inspection of von Janowski's personal effects upon his arrest revealed that he was carrying a powerful radio transmitter, among other things.

Despite an extensive search of Chaleur Bay, both the warship HMCS Burlington and assisting Royal Canadian Air Force aircraft were unable to locate U-518.