Just found this birth record and someone has added a note to it to also be Harriet Ellis.
Name: Harriet Swain
[Harriet Ellis]
Registration Year: 1845
Registration Quarter: Jan-Feb-Mar
Registration district: Penzance
Parishes for this Registration District: View Ecclesiastical Parishes associated with this Registration District
Inferred County: Cornwall
Volume: 9
Page: 235
It's the right quarter going by the what she gives on the poorhouse records.
No mother's name listed, which would make you assume she was born illegitimate. Now I am wondering if Harriet might be the illegitimate daughter of Grace Swine. Maybe Harry ended up with her daughter instead.
this, of course, ties in with the Grace Ellis and Harriet Ellis in the workhouse together in the 1851 census. Now to work out why the switch from Swine/Swain to Ellis.
If my theory is correct, I wonder how she felt about Harry picking her daughter over her, unless the marriage in 1865 of Grace Swine is actually Harriett Ellis, as she appears to be using Grace in 1871.
Such a confusing family.