I just can't see a match
Wondering if she's hiding under a stepfather's name 
Help, someone !!
There is one Elizabeth Hayton born Maryport, daughter of Joseph and Sarah ... Not sure how we could tell if she's the one or not 
I take it you don't have her marriage cert/s ?
Yes, I have a marriage cert :
8 Dec 1869, Parish church, Workington
John Whitaker 23, bachelor, labourer, resident in Workington, father William Whitaker (decd.) Stone mason;
Elizabeth Hayston 24, spinster - resident in Workington, father John Hayston (decd.) miner.
I also have her second marriage to John Clark, 11 April 1880, in Workington parish church, in which she is aged 35, widow, father John Hasting, collier.
In the
1871 census, Udale Street, Workington, Elizabeth aged 26 is recorded with John Whittacker [sic] and family, giving her place of birth as Little Clifton Cumberland.
The
1851 census entry that Liverpool Annie has suggested,
also Udale Street, Workington, the entry appears -
Mary Hayston head widow, 39, farm labourer, born Cumberland Branthwaite
Isabella Hayston, dau, un, 22, charwoman, do. Greysouthern
Maria Hayston, dau, - 10 - do. Clifton
Jane Hayston, dau, - , 8, - do. Greysouthern
Isabella Hayston, dau, - , 6, - do.
Crop Barrow [sic]
Elenor Hayston, dau, - , 4, - do. Clifton
Matilda Hayston,dau, - , 6 months, - do. Workington.
Question: How could Maria have
two daughters both named Isabella - one born when she was about 18, abd the other when she was about 33 ? Is the second Isabella an enumeration error - really my Elizabeth (b. about 1845)??
So why is the only birth entry I can find in 1843?
I have been encouraged, however, to find an 1869 map which shows '
Crossbarrow' within a stones-throw of Little Clifton - so this seems to be possible for Isabella/Elizabeth Hayston.
Any more thoughts would be much appreciated.
I have not been able to find any relevant record in the 1861 census for the Haystons - so any help here would also be welcomed, please.

Mike