Here's a little more to add to the research of G Willis. The Probate Registry records for 1919 “ WALPOLE, Horace of Heckfield –place Hampshire died 4th April 1919, at 17 Park lane Middlesex. Probate London 5 December to Horace John Nevill esquire Philip Langdale Colonel H M Army and Arthue Croxall Whitehead esquire Effects £ 3075. 11. 3d “
According to a report in the Taunton Courier for 16th April 1919 there was an inquest into the death. Walpole died in a nursing home. Death was due to a rabbit bone which he swallowed becoming imbedded in his throat. Verdict Accidental death. The Times of 8th April 1919 records a memorial service at St James Spanish place, London and internment at Heckfield on the following day.