https://www.ancestryheritagequest.com/interactive/1995/MIUSA1775D_1...
Not sure if anyone is interested, but there are quite a few letters and records about Fennells as it relates to their pension claims and heirs. I don't really have the time or patience to go through it all, but I thought it is really cool and I'm sure that there are some cool things to be learned.
Specifically, the Fennell records begin on pg. 324 and include information about Joseph Fennell (died 1/13/1838), Nicholas Fennell III (1762-1828), Morris/Maurice Fennell (1759-1818), Arthur Fennell (Brother of Morris and Nicholas III), Stephen Fennell (of Ohio), Stephen Fennell (of Maryland), Daniel Fennell/er, Jeremiah Fennell/er, John Fennell/er (enlisted 6/77), Joseph Fennell/er (wife: Ruth), and a few more. The Fennell/er records end on pg 769.
Good luck!