Although prolific during his short career, and now one of the most studied and admired British poets, his reputation rests on a small body of work, centred on the Odes, and only in the creative outpouring of the last years of his short life was he able to express the inner intensity for which he has been lauded since his death. Keats was convinced that he had made no mark in his lifetime. Aware that he was dying, he wrote to Fanny Brawne in February 1820, "I have left no immortal work behind me – nothing to make my friends proud of my memory – but I have lov'd the principle of beauty in all things, and if I had had time I would have made myself remember'd."