The doctors warned Keats that a winter in England would kill him, so in September, 1820, he left London for Naples, accompanied by a young artist, Joseph Severn, one of his many devoted friends. Shelley, who knew him slightly, invited him to stay at Pisa, but Keats refused. He had never cared for Shelley, though Shelley seems to have liked him, and, in his invalid state, he naturally shrank from being a burden to a mere acquaintance.
It was as they left England, off the coast of Dorsetshire, that Keats wrote his last beautiful sonnet on a blank leaf of his folio copy of Shakespeare, facing A Lover's Complaint:—
Bright star! would I were steadfast as thou art—
Not in lone splendour hung aloft the night,
And watching, with eternal lids apart,
Like Nature's patient, sleepless Eremite,
The moving waters at their priest-like task
Of pure ablution round earth's human shores,
Or gazing on the new soft-fallen mask
Of snow upon the mountains and the moors—
No—yet still steadfast, still unchangeable,
Pillow'd upon my fair love's ripening breast,
To feel for ever its soft fall and swell,
