John Henry Day b.1851 Hillington Norfolk, the 1901 and 1911 census give him as a Widow and messenger House of Commons with 3 children, living in Paddington London.
I cannot find any military records?? I found two burials but neither give a age.
John H. Day of Brondesbury dies may 1920, Kensel Green Cem No.41591. [This would be my choice]
John H. Day of Holborn d.2 Nov 1940 Islington Finchly Cem K.123090 unmarked common grave.