Rachel
you just have to ask where their evidence is for Ann's surname being Prescott, or whether they have they just made assumptions from the IGI? If the tree is researched then the evidence for Ann Prescott should be easily forth coming. It is a simple 'how do you know'?
If John's birth was registered and a birth certificate acquired you would also know his date of birth from the tree? If not at the very least the Flixton marriage register had to be checked to eliminate a marriage there, and then the Manchester Cathedral register checked to find the parishes of origin of that James and Ann, or how else is it proved? If Flixton registers were checked then obviously the registers should also have yielded up the names and the baptismal dates for James and Ann's children.
So do you have all this information on the tree?
Why is the earlier baptism the correct baptism for James when his age on censuses and at death would seem to indicate the 1797 baptism is the likeliest? Has the baptismal register been checked and it indicates that Henry and Ann were not from Urmston but John and Nancy were?
The year older James Shawcross still appears to be living in Urmston on the 1851 census.
HO107 2218 folio 441
Fant Urmston Lancashire
James Shawcross 54 Stretford, Lancashire, Head Married Farmer 36 acres
Mary Shawcross 50 Urmston, Lancashire, Wife Married
Helen Shawcross 30 Urmston, Lancashire, Daughter Employed at home
Elizabeth Shawcross 28 Urmston, Lancashire, Daughter Employed at home
Matthew Shawcross 23 Urmston, Lancashire, Son Employed on the farm
James Shawcross 19 Urmston, Lancashire, Son Draper
John Shawcross 16 Urmston, Lancashire, Son Grocer
Amos Shawcross 13 Urmston, Lancashire, Son
David Shawcross 11 Urmston, Lancashire, Son
Isaac Shawcross 10 Urmston, Lancashire, Son
Stretford I believe is in Flixton parish as well.
1841 census HO107 543/16 Folio 7 Page 10
Frant Urmston Flixton Lancashire
James Shawcross 45 Lancashire Farmer
Mary Shawcross 40 Lancashire
Ellen Shawcross 20 Lancashire
Elizabeth Shawcross 15 Lancashire
William Shawcross 15 Lancashire
John Shawcross 6 not born Lancashire
Amos Shawcross 3 Lancashire
David Shawcross 1 Lancashire
Both men have sons called John and William.
Does your father-in-law descend from the cotton weaver or the farmer and how do you know?
Regards
Valda