This looks like it could be his family?
1901 census, Reference RG13, Piece 1306, Folio 33, Page 24
33 Frampton Street, Hertford
Medcalf, William J Head M 40 Labourer in Brickfield b Ware
Medcalf, Jessie M Wife F 31 b Redbourn, Herts
Medcalf, Henry T Son M 11 b Redbourn
Medcalf, Ellen E Daughter F 9 b Redbourn
Medcalf, William J Son M 7 b Redbourn
Medcalf, Alfred P Son M 5 b Dunstable, Bedfordshire
Medcalf, Frederick C Son M 2 b Dunstable