In 1851 William Roskilly, aged 30, born in Marazion Cornwall, unmarried, watch maker, was living in Fore Street, Fowey, Cornwall.
In 1861 William Roskilly, aged 41, born in Marazion, unmarried, watch maker, was living in Fore Street, Liskeard, Cornwall. With him was widow Grace Pearce (40) of St. Just, houskeeper (whom William married shortly afterwards).
In 1871 William Roskilly, aged 51, born in Marazion, watchmaker, and wife Grace Roskilly, aged 55, born in St. Just Cornwall, were living in Church St., Liskeard.
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ROSKILLY.—At Fore-street, Liskeard, July 23, Mr. William Roskilly, son of the late Mr. Peter Roskilly, of that town. Mr. Roskilly was the author of a volume of odes and other poems of 191 pages, published in 1846, and also of several other poetical pieces.
Royal Cornwall Gazette, Friday Morning, 2 Aug 1878, p. 5