Born on the 12th November 1893, at Ponsbourne Lodge, Newgate Street, Hertfordshire. Son of Joshua F Allum, a Waggoner and Rose Allum. Baptised on the 17th December 1893, in the Parish of St Mary, Hatfield, Hertfordshire. The 1901 Census shows William aged 8 years and living with his parents, sister and brother at Cucumber Hall Farm, Essendon, Hertfordshire. The 1911 Census shows William aged 18 years and living with his parents still at Cucumber Hall Farm. His occupation a Farm Labourer.