Where is the best site for this query? What happened to Mary Mahoney born 15 Jan 1898 in New York City?

Answer 1

There are quite a few services out there dealing with genealogy. I have very little experience with those and cannot really help you deciding which one is the best. Most of them are not free either.

Here is an example:
http://www.usa-people-search.com

Also, you might be lucky and somebody in the Mahoney familiy is into genealogy and even has a website running dealing with the Mahoney family, maybe this one:
http://www.usgennet.org/usa/ga/county/dooly/mahoney.htm


Apart from that, New York City most probably keeps track of births and most certainly have an office or bureau that can help you out there.