Probably John Kenyon, whom Miss Mitford elsewhere calls 'the pleasantest man in London;' he, on his side, said of Miss Mitford that 'she was better and stronger than any of her books.'
Nineteen years, Miss Mitford having been born in 1787.
Recollections of a Literary Life, by Mary Russell Mitford, p. 155 (1859).
i.e. copies of the Essay on Mind.