You might try www.linkpendium.com
This site has links to resources in every state and county.
Also, this is a New York newspaper site that is freehttp://www.fultonhistory.com/Fulton.html
I searched on "Robert G. Moore" and "red hook" and also "Dorothy M. Clow" and "red hook" (it is important to put it in quotations marks, or you will get way too many hits). I was hoping to find a notice of marriage for Robert and Dorothy, with their parents, but no luck. I found several mentions of people attending Robert's funeral, but no actual obit. I did find Dorothy's obit, searching for Dorothy M. Moore. Also when I searched for Dorothy Clow, I found an interesting article from 1876. It seems that Robert was sued by another woman for breech of promise. He was courting this other woman, Martha, then left and married a woman named Fanny. When Fanny died, he went back to courting Martha. He then left Martha again and married Dorothy. He claimed he never proposed to Martha, but she won $400!