Apologies if you receive this message twice, but my message doesn't appear to have posted. I too am looking for Biggerstaffs and have got as far as Joseph and Elizabeth and their children. I am unable to find a birth/christening record for Joseph. My father in law knew that there had been a name change at some time from Bickerstaff to Biggerstaff, and this appears to have happened around George's time, though there is some confusion as from memory I think his children were Biggerstaff, although George's birth and marriage records are Bickerstaff. Family rumour says it was because he worked for a Mr Biggerstaff and so changed it to avoid confusion. My father in law also remembers a story that at some time the family moved from Lancashire to Herts, but doesn't know if that story is correct and if so when the move happened. If you have got any further in the search for Joseph's parents I would be grateful to hear from you as I have hit a dead end!