Guleserian v. Fields

*239Cutter, J.

The plaintiffs (the mortgagors) are the trustees of a Massachusetts real estate trust which owns, subject to the mortgages hereinafter mentioned, land and buildings (the locus) on Garden Street, Cambridge. On September 15, 1960, the mortgagors gave a duly recorded first mortgage covering the locus to Charlestown Savings Bank (the bank) to secure the payment of $750,000 “in fifteen years, with interest thereon, or on any unpaid balance thereof, and on any sums hereafter advanced by the [h] older which lawfully accrue to the mortgage debt, as provided in our . . . note of even date.”…