.They had a daughter Sarah born 1800 who married George Henry Stevens at Hackney Middlesex 1826.I think George was a schoolmaster-could be wrong.
Nothing on William and Catherine -but It looks like you are correct re George Henry Stevens occupation - Sarah was a schoolmistress too!
1841
Church St Lyme regis Dorset
George Stevens 35 Ind no
Sarah 40 yes
William 13 yes
Catherine 11 yes
Thomas 9 yes
Jane 5 yes
Sarah 3 no
George 1 yes
HO107 294 9
1851
Church St Lyme regis Dorset
George H Stevens Head M 46 schoolmaster Camberwell Surrey
Sarah wife 51 Schoolmistress
Catherine dauhgter U 21 schoolmaster's daughter
Jane daughter 15 Milliner
Sarah daughter 12 scholar
George H son 10 scholar
Henry son 7 scholar
Sarah and children all b Lyme Dorset
HO107 1862 91 21
Suz