Are these the Charlotte Comstock and Daniel Comstock you are looking for?
from familysearch.com: Charlotte COMSTOCK (AFN: 1Z06-N9)Sex:F Birth:1828/30Laurens, Otsego, NY Father: Daniel COMSTOCK (AFN: 1Z06-5P) Mother: Mary "Polly" BISSELL (AFN: 1Z06-6V) Spouse: ?? DOUGLAS (AFN: BJDN-Q7)(He was born about 1828, probably in Otsego, NY.)
from John Adams Comstock, this Daniel Comstock 7 is in the line back from Martin Luther Comstock 6, Abel Comstock 5, Daniel Comstock 4, Daniel Comstock 3, Christopher Comstock 2, and William Comstock 1. This Martin Luther Comstock enlisted as a private under General Charles Lee, June 21, 1776. My reference (History and Genealogy of the Comstock Family in America) has more data about most of these people.