The Assembly also authorized the town commissioners to annex so much of Gist's Inspection and Howard's Timberneck as "well calculated for the purposes of commerce and navigation". Part of Timberneck was left outside the town limits but all of Gist's Inspection was appended to Lunn's Lott and included.102 The influx of the Acadian French from Nova Scotia and Scotch-Irish from central Pennsylvania increased the population, from over six thousand in 1776 to more than thirteen thousand by 1790. These newcomers demanded affordible houses.103 John Eager Howard and William Fell the younger were the primary suppliers of land, selling and leasing hundreds of acres of land within the Town limits. They utilized Thomas Harrison's ninety-nine year lease plan to dispense most of the lots, retaining a ground rent. Typically, the lots were leased to speculative builders, who further subdivided the lots and built houses in block rows for sublease to artisans and mechanics and skilled workers.104 Indeed the demand for housing close to the town center was great enough that in the 1780's developers began to fill the mud flats and fringing marsh to make building lots. They were encouraged in this practice by the 1745 act incorporating Baltimore. It provided: "[t]hat all improvements of what kind soever, Either Wharf, Houses, or other Buildings, that have, or shall be made out of the Water, or where it flows, as an Encouragement to such improvers, be forever deemed the Right, Title, and Inheritance of such Improver or Improvers, their Heirs 41 .