In rechecking my later notes---after I posted the original query---I went on to ascertain that Merrit was the son of Alvah Hubbard, Sr and Mary Ann/Polly Dye, of Middletown Springs, Rutland Co, VT found in the 1850 Middletown, Rutland Co, VT census.
According to Fort Ann, Washington Co, NY vitals: Merrit Hubbard died 26 November 1893 in Fort Ann, NY
Just put together, this morning, that Matilda Hubbard is the daughter of Truman Kilburn and Elizabeth Spooner.
You're welcome to email me directly--makes things easier for more, in depth discussion; also should records exchange be desired. firstname.lastname@example.org