I have since found the people I was looking for on the 1881 Census.
Henry Hamlett place of birth is given as Stroud Somerset, I believe this should be Gloucester. He married Bridget Daly on 9 March 1866 Clonmel, Tipperary, Ireland
RG11/3836 Folio21 Page36 1881 Census Lancashire Extract
12 Livingstone St, Little Bolton, Lancs - Henry Hamlett Head M 41 M Picture Hawker Stroud, Somerset (sic) Bridget Hamlett Wife M 36 F Ireland John Hamlett Son 14 Scholar Ireland Mary E Hamlett Daur 12 Scholar (For), United States Frederick Hamlett Son --9 Scholar Bermuda William H Hamlett Son5 Scholar Bermuda George J Hamlett Son2 Preston, Lancs Ada Hamlett Daur --1m Bolton, Lancs
By the 11th November 1911, at the time of his marriage to Edith Flanagan, George J Hamlett had become George J Hamilton. He went on to father possibly 20 or more children by at least 3 women.
If anyone has any information on Henry Hamlett from Stroud and his family I would be pleased to see it.