During the spring of 1819, Keats wrote many of his major odes: "Ode on a Grecian Urn", "Ode on Indolence", "Ode on Melancholy", "Ode to a Nightingale", and "Ode to Psyche". After the month of May, he began to pursue other forms of poetry, including the verse tragedy Otho the Great in collaboration with friend and roommate Charles Brown, the second half of Lamia, and a return to his unfinished epic Hyperion.[3] His efforts from spring until autumn were dedicated completely to a career in poetry, alternating between writing long and short poems, and setting himself a goal to compose more than fifty lines of verse each day.