In the 1891 census the Osborn's are living in Hare Street, Castleton, Lancashire and Percy who is 20 years old lists his occupation as 'Student'. Also at the address is his father Edward Haydon as head of the household aged 59, 'H M Inspector of Factories 1st Class'; his mother Augusta aged 43, his brother William Evelyn, aged 23 an 'Artist Painter' and his sister Harriette A M Osborn aged 16.
In the 1911 census Percy, aged 40, single and living on 'Private Means' is living at 23 Kilburn Priory, Hampstead, London, at the home of Henry George Strugnell aged 49 (born 1862, Box, Wiltshire) a 'Cab Driver'. Henry's wife (they were married in 1887 at St George's Hanover Square, London) Josephine Francois Strugnell nee Clement, aged 50 is a 'French Resident'. Their daughter Florence Eugenie Marie Strugnell, aged 23 (born 1888 in Hammersmith, Middlesex) is listed under occupation as 'Book Keeper Provision'. Also boarding at the address are: Zillah Barker, aged 43 (born 1868 of Hammersmith, Middlesex), single female living on 'Private Means'; Joseph Wecks, 30 (born 1881, Copthorne, Sussex) a single 'Butcher Worker', and Edith Borritt, aged 30 (born 1881, Hornsey, Middlesex) who is a single 'Shop Assistant'.