The land was surveyed and lots sold by auction in July 1749. A map with a notation of the purchasers was made by George Washington,[34] at that time a boy of seventeen. On the north, the lots lay along the north side of Oronoco Street, one block below Water Street (later Lee; at that time it was interrupted between Queen and King Streets by the shore line of the River), and on the south, lots were laid off on the south side of Duke Street. The Potomac with its bend between Oronoco and the south side of Prince Street, formed the eastern boundary, while the western was a line of lots on the west side of Royal Street. There were 84 lots in all, four to a block for the most part except for the northwest portion where a stream, rising on Pitt Street between Cameron and Queen, drained into the Potomac north of Oronoco Street. This is the "first branch above the warehouse" referred to in the charter. [34] In the Library of Congress. Reproduced in Moore, _Seaport in Virginia_, pp. 10-11. The first increment came in 1762 when the General Assembly passed "An Act for enlarging the town of Alexandria in the county of Fairfax."[35] On the ground that all of the lots included within the bounds of the town had been built on except for some lying in low wet marsh, this Act included in Alexandria the "... lands of Baldwin Dade, Sibel West, John Alexander the elder and John Alexander the younger which lie contiguous to the said town ... beginning at the corner of the lot denoted in the plan of said town by the figures 77 [at the south side of Duke St., three lots from its intersection with Water (Lee) Street] on the said river Potowmack, at the lower end of the said town, and to extend thence down the said river the breadth of two half acres, and one street thence back into the fields, by a line parallel to the lower line of the said town, such a distance as to include ten half acre lots and four streets; thence by a line parallel with the present back line of the said town to the extent of seventeen half acre lots and eight streets, and from thence by a line at right angles with the last to the river." [35] Hening, Vol. vii, p. 604. Acts of Assembly, November 1762, Chapter XXV.