The NH Records and Archives Center has all NH Province Deeds, Volume 1 to 100 from 1623 to 1771. There is a name index. The NH Historical Society has microfilm of these. Also at the Records and Archives Center are Rockingham County Deeds, Volume 101 to 239 from 1770 to 1824. There is a name index. The Rockingham County Register of Deeds at Exeter has microfilm of these.
Land Transfer Records
Each county maintains all records of land transfers, with grantor-grantee index, from the time of establishment of the county to the present. The first counties were established in 1769. To find what county a town was in at a given date refer to the summary of legislation on county boundaries in NH Manual for the General Court (red book).
The NH Records and Archives Center has the file of Probate Records from 1623 - 1771. These have been published in NH Provincial and State Papers volumes 31 to 39. There is a name index. The NH Historical Society has microfilm copies. Each county has Probate records with name indexes from 1772 to the present.