William Fawcett - England to St. Lawrence Co., NY

I am looking for information on descendants of William Fawcett (b. 1799, Kirkby Ravensworth, North Riding, ENG) who married to Margaret Richardson in England and had several children: Ellen and/or Eleanor, and John.

Margaret died in England, and William came to NY with the children in 1826. I know that he married again (possibly to Ann ?) and had at least four additional children, but I don't know their names.

I believe this 'William' appears with 'Ann' in the 1870 St. Lawrence Co., NY Census (Macomb township), living ironically(?) with a younger Richardson couple.

I descend from John (b. 1823) who married Susan F. Hamilton in Belleville, CAN, became a Methodist minister, and spent much of his life in Iowa.

Ellen/Eleanor married Hiram Mitchell in Ogdensburg, and had three children: Sarah, William, and George.

I have no additional information on the children of his second marriage.