Using FreeBMD (
www.freebmd.org.uk), this looks a good bet for Arnold's birth?
Births, March qtr 1894
Walsingham Registration District vol 4b, page 296
Stapleton, Arnold
Do you have the marriage certificate for Arnold and Jennie?
His father would be named on there, and that would make him easier to find in censuses.
1901 census shows Arnold living in Ipswich, with parents James & Hannah.
Arnold born in West Raynham, Norfolk.
West Raynham is one of the many parishes within the Walsingham Registration District.
Arnold died in 1976, in Ipswich.
His date of birth is shown on the death registration as 26 January 1894.