 Money was always a great concern and difficulty for him, as he struggled to stay out of debt and make his way in the world independently.Having finished his apprenticeship with Hammond, Keats registered as a medical student at Guy's Hospital (now part of King's College London) and began studying there in October 1815.Within a month of starting, he was accepted as a dresser at the hospital, assisting surgeons during operations, the equivalent of a junior house surgeon today.