From the 1891 census one can conclude that his sister was Frances Alice Morris (but nobody has cracked who her parents were either. But BMD leads me so suspect that they were born Frances Alice Clark and Leonard Frank Clark in Bath in 1888 and 1891 respectively. It would need a number of birth and marriage certs to track what happened. Frances Alice Morris married in 1911, but he husband deserted her, and he later bigamously married a second woman, for which he got a 9 month gaol term)
1890 Dec 6 Born Somerset
1891 census at Temperance Place, Bath.
1918 Feb 9. Married woman from Somerset
1920 Dec 7. Joined RIC no 76410 & ADRIC no (917) .ex-soldier and motor fitter
Posted to P Coy
1921 Mar 19 Posted to I Coy
1922 Jan 27. Disbanded
There is a Leonard Morris in 1939 Register , born 6 Dec 1890. He is a Fitter Coal Mining Engineer living at 70 London Road, Worcester, Married but no wife there