Bill, you might want to try the New Hampshire Antiquarian Society, located in Hopkinton. I got tons of help on a local family there, several years ago.
Also, the nearest good-sized town is Concord. They have at least one newspaper, where I have found various news items, including death notices.
Another possible source is the Merrimack County, NH GenWeb site.
Try Googling both of these sources for contact information.