Hi Cathy
This may be them in 1841:
Buckland Monachorum, Devon
Harriet CALLICOTT (sic) 35
James 12
Jane 9
Louisa 8
John 6
HARRIET 5
all born in county
Cannot find their baptisms on IGI

1851
Walkham, Whitchurch
John Palmer head mar 65 chelsea pensioner b Sampford Spiney
HARRIET wife mar 49 b Stoke Damerel
James COLLOCOTT son unm 22 painter
Jane COLLOCOT dau unm 21 worsted spinner
Louisa COLLOCOTT dau 19 "
John COLLOCOTT son 17 Copper miner
HARRIETT COLLOCOTT dau 15 worsted spinner
the only marriage i can see at the moment is
John Palmer = Harriet Callicott
dec q 1853, Tavistock
will look some more....
Do you think the above family is yours ...?
deb