If you are attempting to research your family genealogy there are several places that you can go to get the information that you need.

For vital records I have found that the best place is the Division of Vital Records Administration in Concord. You can peruse the actual records yourself and make copies for your records. These include birth, death, and marriage records. The facility in Concord is charged with holding all the records for every town. It can be very useful to look for a person without regard to town. They also have researchers on site that can look up information and provide copies, all at a small charge. Please review their site for your access rights to the records and current costs.

Real estate records can also provide valuable information on your ancestors. These records are located at the county seat and for Jaffrey that would be Keene.

Court Records need to be located at the county level at the Superior Court, etc. or the state level at the Supreme Court.