On the death of Professor Maréchal, his daughter persuades Jules and Phileas to take his remains to the coast, where they find the machine Maréchal created that can supposedly bring the dead back to life. The daughter sends the men away and then tries to revive her father. The attempt succeeds, but she finds out that her father was working with the League of Darkness, and he killed himself to prevent the finished device from falling into Count Gregory's hands. Phileas and Julies return and manage to disrupt the scheme, and Maréchal dies one final time.
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