1749:  Lewis Evan's "Map of Pensilvania" locates the Bushkill River, Broadhead's Plantation, and Dupui's trading post; the Walpack Bend in the Delaware River is visibly noted on maps for the first time.

1756:  Map commissioned by General Shirley during the the French & Indian War depicts the location of area fortifications;  the Dupui trading post (designated as a blockhouse capable of housing up to thirty men), appears as #10 on the map.

1759:  Map by Nicholas Scull depicts Upper & Lower Smithfield, local Fort Hamilton, area roads, the Walpack Ferry Crossing, Brodhead's plantation. the site of Hyndshaw's Mill and the location of Dupui's trading post.

1768:  Map by Samuel Holland depicts Depues, Fort Hamilton and the Walpack Ferry crossing.

1770:  Map by Nicholas Scull shows the area's Great Swamp and Shades of Death, Dupui's trading post, the Walpack Ferry crossing, Fort Penn and Fort Allen.

1777:  Map by William Fadden depicts Dupui's trading post (now spelled as Dupuy), Broadhead's plantation, Fort Penn, the Walpack Ferry and Hyndshaw's mill.

1777:   From "A NEW AND ACCURATE MAP OF THE PRESENT SEAT OF WAR IN NORTH AMERICA" shown in The Universal Magazine of June 1777, Dupui's trading post is depicted along with Fort Hamilton and the Walpack Ferry site

1792:   From Howell's "Map of the State of Pennsylvania", Dupui's trading post is shown (now spelled as Depuys) along with the location of Fort Penn.

1795:   Map by Samuel Lewis showing the location of Depuys.