What happened to Keats' translation of Vergil?

[Saturn]

I remember reading in both Robert Gittings and Andrew Motion's biographies about Keats' schoolboy prose translation of Vergil's Aeneid undertaken at Clarke's School in Enfield. Does anyone know what became of this? Has it been lost to history, or is it in some private collectors hands? I would be interested to find out what became of his first ambitious literary project.