This looks like the family in 1901:
Reference RG13, Piece 2094, Folio 75, Page 16
6 Connaught Avenue, Plymouth, Devon
Thomas, Richard Head M 48 Commercial Traveller b St Ives, Cornwall
Thomas, Mary Wife F 35 b Launceston, Cornwall
Thomas, George Son M 13 b Penzance, Cornwall
Thomas, Frederick Son M 12 b Exeter, Devon
Thomas, Gladys Daughter F 8 b Exeter, Devon
Thomas, Stuart Son M 7 months b Plymouth, Devon
Thomas, Beatrice Servant F 16 Domestic Servant b Bodmin, Cornwall