30 Nov 1770: "John Langdon jun'r of Boston ... Merchant" for £133=6=8 conveys to "John Langdon of Boston ... Merchant" "all my right title and Interest (except the Mansion house entailed to me by the Will hereafter mentioned) which I have in the Estate of my late grandfather Edward Langdon late of Boston in said County of Suffolk Tallowchandler". [Will of Edward Langdon, dated 1760 is here. The house and lands given to John were on Fleet Street in Boston.]
Vol. 163, p. 11 July 1788: John Langdon of Pownalborough mortgages to Samuel Breck of Boston a house on Fleet St. for %pound;196.
Vol. 173, p. 85 18 May 1792: John Langdon of Pownalborough Merchant for £339 to Elisha Bangs Merchant and William Cordwell jr. Coppersmith of Boston a house in Boston on Fleet Street [bounded by Mary Langdon (i.e., probably his mother) and others] free of all encumbrances except a mortgage to Samuel Breck.
Vol. 178, p. 260 9 Aug 1794: Mary Langdon of Boston Widow for £200 conveys to Richard Lane Pico of Boston baker land on Fleet St. Accompanied by Judge's ruling that will of her husband John Langdon of Boston proved 24 Jun 1783 allows Mary to sell this land.
[Note: this series of deeds, combined with the mention in the father's will of land in Pownalborough is presented to refute claims by Source:Thwing, Annie Haven. Inhabitants and Estates of the Town of Boston, 1630-1800, and the Crooked and Narrow Streets of Boston, 1630-1822 that it was John of Pownalborough who married Mary Walley. That was the son of Nathaniel, who is called John Langdon Esq, with wife Mary, in several deeds in combination with his mother Abigail, while John Langdon of Pownalborough is consistently a merchant and the deeds suggest by owning adjacent property, is related to Mary, widow of John Langdon.]
