No conveyance in writing of lands shall be defeated nor any estate encumbered by an agreement unless it is inserted in the condition of the conveyance and made part thereof, stating the sum of money to be secured, or other thing to be performed.
N.H. Rev. Stat. Ann. § 479:2
Condition
Source
Official source: New Hampshire General Court. Reproduced from public-domain New Hampshire statutes; confirm against the official source for the current text. Not legal advice.