Joseph Coles got married between his hospitalisation in 1817 and the presentation to the Somersetshire Society of a report into his conduct as an apprentice in March 1819 (Somersetshire Society, 1819, March 15) that said:

… subsequent to the time when he was in the hospital for the cure of the Venereal disease he had been in the habit of staying out all hours of the night sometimes all night and frequently whole days – that he had formed a connection with and had ultimately married their discharged Servant maid …

The only suitable candidate that I’ve found for Joseph’s marriage was conducted by banns on October 27, 1818 between Joseph Coles, bachelor, and Sarah Gillit, spinster, in the parish of St Mary Lambeth, Surrey (St Mary Lambeth, 1818). The officiating minister was Arthur Gibson, curate, in the presence of James Longman Gawler and John Seager.

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1. Somersetshire Society (1819, March 15). Meeting of the Committee, Albion House. Minute Book of the Somersetshire Society, 1811-1819, 236.
Somerset Record Office: DD\SMS/2/1
2. St Mary Lambeth (1818). Register of Marriages, entry 453.
London Metropolitan Archives: P85/MRY1/399