Thank you for the responses and welcome! See below, but I now have reason to believe John Worsley was a James Worsley, and James's parents were Joseph Worsley and Mary. There's a date of Feb. 9, 1733 attached to Joseph and Mary but unsure if its a marriage or birthdate. To your question, Rosie, these were the children born in the UK:
John Hallam Worsley, b. 8 Nov 1803 in Manchester
Sarah Hallam Worsley b. 4 Nov 1805 in Bury
Eliza Worsley b. 7 Feb 1808 in Bury, Huntingdonshire.
William Hallam Worsley 10 June 1810 in Middleton
Henry Worsley 16 July 1812 in Middleton
Mary Ann Worsley b. 29 June 1814 in Middleton
George Hallam Worsley b. 18 Aug 1816 in Middleton
The other five born in the U.S.:
Emma Worsley: b. 25 Feb 1820 in Pawtucket, R.I.
Abbie Worsley: b. 5 Dec 1821 in Pawtucket, R.I.
Napolean Bonaparte Worsley: b. 25 Aug 1825
Maria E. Worsley: b. 8 July 1825 in Attleboro, MA
Samuel Lord: b. 10 Aug 1827 in Attleboro, MA
And no, I wasn't just trying to see if you were paying attention with Napolean Bonaparte, that's really what they named him. Maybe by the time they got to him, they'd just run out of names. I don't know how Sarah Hallam did it! For what its worth, I'm a descendant of George, who would be Great Great [Edit: Great] Grandfather.
I just got a little more info via an email my father received from another relative:
One of my grandmother's cousins wrote to a library in Manchester (John and Sarah were married in Manchester Cathedral, Feb. 15, 1803) and got a little more information. Apparently John's father was James Worsley, and James's parents were Joseph Worsley and his wife Mary. There's a date of Feb. 9, 1733 attached to the grandparents, but it's not specified whether that's a wedding date, or a birthdate for one of them.
All we know about Sarah Hallam is that she was born in Bury, England in 1785. There's a rumor she was a "barmaid", and we have a photo that somebody thought was her, but I don't know if either of those things is true.
"John Worsley “was a shuttle maker by trade, and therefore part of the beginning of the Industrial Revolution in England. When he emigrated to the U.S. in 1817, he settled in Pawtucket, Rhode Island, and there put in the shuttles used in the first power looms in the U.S. His reason for emigrating was apparently working conditions. The family then moved to Attleborough, Massachusetts, where five of the children were born. He and Sarah had six sons and six daughters, all of whom survived to adulthood. The sons were all machinists. In 1836 he went to Illinois with at least one son, George Hallam Worsley, who worked for him for several years.”
This makes far more sense than him moving to America and opening a factory!