Before the Anatomy Act of 1832 widened the supply, the main legal supply of corpses for anatomical purposes in the UK were those condemned to death and dissection by the courts. This led to a chronic shortage of legitimate subjects for dissection, and this shortage became more serious as the need to train medical students grew, and the number of executions fell. In his school Knox ran up against the problem from the start, since—after 1815—the Royal Colleges had increased the anatomical work in the medical curriculum. If he taught according to what was known as 'French method' the ratio would have had to approach one corpse per pupil.