One of the best, if not the best, of the Rathbone-Holmes series. It's got mystery, suspense, and even atmosphere, as Holmes tries to solve a series of mysterious killings in a small French-Canadian village. Interestingly, the killings are preceded by a number of sheep mutilations that recall the real life cattle mutilations in the Southwest of several decades ago. Supernatural forces were suspected both here and and in the real life cases. In fact, a subtle subtext here has Holmes dismissing supernatural causes such as werewolves, vampires, etc., in favor of things more ordinary, like demented people. Ironically, Holmes's studio, Universal, is the same studio that popularized these same monsters in one movie after another during the same time period. In fact, the foggy outdoor set, so atmospheric here, looks like the same set Lon Chaney kept prowling in one version or another of the Wolfman. Anyway, there're a number of clever wrinkles heightening the mystery and suspense, including the "glowing" apparition and a really fine performance by Paul Cavanaugh as the uptight aristocrat. My only complaint-- they tipped their hand on the nature of the apparition too soon. That should have been saved for the last. Nonetheless, it's a clever "what-is-it-that-done-it that keeps us guessing right up to the shuddery climax.