The enterprise proved very profitable, so long as the coal dealers of 2sew York gladly gave the coal dust in exchange for carting it away from their yards ; as lime kilns on the same plan increased and other uses were found for coal dust the profits diminished and the work was abandoned in 1S37.

In 1849 Major Dclafield built a residence in a beautiful position overlooking the river, which he occupied in summer until his death. It is now enlarged and occupied by his eldest son. His second son built at Fieldston in 1S70.

Major Joseph Delalield born 2-d. August 1T90, graduated from Yale college 1808, studied law wi;li Hon. J. Ogden Hoffman, aduiitted to practice 1811, appointed lieutenant 1810 and captain 1812 in Hawkins famous battery of artillen,-, and in the following yrar major of the 46th U. S. infantry. At the close of the war he resigned his commission in the army and wishing active service accepted the appointment first of acting and later as full agent for settling tlie northern boundary of the United States under the 6th and 7th articles of tl;c treaty of Ghent. Until 1828 his summers were occupied in command of the detachment on the boundar}', there he commenced the formation of his afterwards famous collection of minerals. The long co'd winters of the north preventing active operations he p-.i-^ied in New Y^irk, Tloston, riiilailclphia and WaslunLrtoi!. ;ihvay3 studious but not neglectful of the plea.-;urcs of societj-. He marrinl li2ih De-

626 HISTORY OF THE COUNTY OF A\T.STCH ESTER.