Richard Pinkham of old Dover, New Hampshire and his descendants East and West by Sinnett, Charles N. (Charles Nelson), 1847-1928
There are numerous Clough references in this family genealogy, including, but most certainly not limited to, Emma Jane Clough (born in Litchfield (now West Gardiner), Kennebec, Maine), who married Benjamin Hopkins. Both are in the JCGS database.
Incidentally, Charles Sinnett is a name I ran across when looking for various Clough genealogies. A quick search on archive.org revealed 17 books authored by him.
Also check out “A Complement to Genealogies in the Library of Congress: A Bibliography” for more.