Mania [aka The Flesh and the Fiends] (1959)

In this well-done retelling of the tale of infamous body-snatchers Burke and Hare, Peter Cushing (in a characterization not unlike his Dr. Frankenstein) is Dr. Knox, a coldly detached surgical pioneer who needs corpses; Donald Pleasance and George Rose play the gruesome pair who are only too ready to oblige with a ready supply. Very graphic for its time, with an atmospheric evocation of 19th Century Edinburgh in all its dismal glory.