While this is contrived and silly at times, the best part of it, for me, was the fact that everyone knows what Holmes is up to and he still manages to come out on top. There are two plots at work here. One has to do with the transporting of stolen emeralds and the other the transporting of royalty. On numerous occasions, Holmes turns the tables on his adversaries. The dangers are everywhere and his head spins like an owls as he peers over his shoulder, through the fog, and through portholes. He sets up a wonderful ruse. The men who are out to squelch his efforts are really interesting: a mute thug who uses sign language, a wiry Peter Lorre type with a foreign accent, and a sort of Sydney Greenstreet wannabe. Watson becomes enamored with a pretty young singer who is carrying around secrets. He even belts out his own version of "Loch Lomond" and he proves to have quite a beautiful voice. Without giving anything away, Holmes keeps his cards close to his vest until the denouement. He suspects no one; he suspects everyone. I think this is a lesser effort, but still a lot of fun.