What is the earliest surviving poem by John Keats, composed in 1814 when he was 19 years old?

Explanation

Among the listed works, 'An Imitation of Spenser' is recognized as John Keats's first extant poem, written in 1814 when he was nineteen. The other poems, such as 'La Belle Dame Sans Merci', 'Ode on a Grecian Urn', and 'Ode to a Skylark', were composed later in his career.