Richard Grosvenor was born on 3rd November 1878, at Long Sutton, Lincolnshire, he was registered in Q4 1878 at Holbeach. He was the son of Richard Peele & Mary Elizabeth (nee Grosvenor).
On the 1881 census, aged 2, he is living at High Street, Holbeach, Lincolnshire with his parents and siblings.
Entry in The London Gazette, July 27, 1915
The undermentioned members of the Inns of Court Officers Training Corps to be Second Lieutenants (on probation):-
Entry in The London Gazette, May 8, 1917
Wilts R. - 2nd Lt R. G. Mossop is secd. for service with the W. Afr. Frontier Force, 21st Mar. 1917.
Entry in The London Gazette, August 23, 1920
SPECIAL RESERVE OF OFFICERS
On the 1891 census, I cannot find him.
On the 1901 census, aged 22, he is living at 7 Quain Mansion, Fulham, London with his wife Frances Mary (nee ?).
Richard Grosvenor Mossop, 3rd Battalion, Wiltshire Regiment.
3rd Wilts. R.
Lt R. G. Mossop, relinquishes his commn., 22nd Apr 1920, and retains the rank of Lt.