There was an Ann Peirce b. 3.20.1792 married to a William Brown. Ann was the daughter of Joshua Peirce 1751-1841 and Sarah Taylor 1756-1837. I am not sure who William Brown's parents were. I have a David Brown and Hannah ? with a son William b. 10.26.1787 who might be your William, but I don't know anything more about him. Barclay