Tompkins county has a great get web site at http://nytompki.org/
. A query into your Jacob and Mahala Mead marriage led to a result of another query from 2002 regarding information on Jacob's parents. She had a bit of info, including some on their marriage in Ludlowville, NY 18 May 1847. If you type Jacob's name in the search box, the first hit will lead you to the info she has on the Family (she's a direct descendant). Good luck in your search!