A mortsafe or mortcage was a construction designed to protect graves from disturbance, used in the United Kingdom. Resurrectionists had supplied schools of anatomy since the early 18th century. This was due to the necessity for medical students to learn anatomy by attending dissections of human subjects, which was frustrated by the very limited allowance of dead bodies – like the corpses of executed criminals, other deceased prisoners and suicide victims – granted by the government, which controlled the supply.