Before Calculus appeared in Red Rackham's Treasure, Hergé had featured other highly-educated but eccentric scholars and scientists, such as: * Dr. Sophocles Sarcophagus of Cigars of the Pharaoh who showed signs of being clumsy and forgetful before going completely mad. * The absent-minded professor who appeared in The Broken Ear and who forgot his glasses, wore his cleaning-lady's overcoat, held his cane upside-down as if it were an umbrella, mistook a parrot for a man and left his briefcase next to a lamp post. (In the original edition published in 1935 his name is given as Professor Euclide, after the Greek mathematician known as the Father of Geometry). * Professor Hector Alembick in King Ottokar's Sceptre, who had a bad habit of throwing his cigarettes on the floor. *