This is a detail showing the Trappe area done in 1835 for J. H. Alexander's map of Maryland. The complete map was never published. This is the first map to show the spelling Trappe. All other known maps from 1795 to the early 1850s use the earlier spelling of Trap. The town was officially incorporated as Trappe in 1856.        The map has several errors: some of the roads shown are probably not correct. For instance Island Creek Neck road ran to Trappe which is not shown and Glory Pt. is certainly a mistake for Clora's Pt. Despite its many inaccuracies, this was the most detailed map done to date.        The map also shows geological points of interest inc. deposits of marl and shells, marine deposits used to reduce acidity in soils.