Catherine,
My father, Brewster Yale Beach, provided Moses Sperry Beach family archives to the Associated Press in New York in 2006 which helped the AP establish the correct year of the founding of the AP (see:
http://www.ap.org/cleartime/index.html). Moses Yale Beach was a son of Moses Sperry Beach and my great grandfather I believe (or gggrandfather). I must refer to the family tree my father was working on before his death in 2008 to make sure of my facts.
Please let me know if you were successful in finding out more about Moses Yale Beach and Nancy Day.
Thanks.
Robert Brewster Beach