- On paper w. watermark "J. Honing & Zoonen" (1737-1787). A few sm. tears at ends and intersections of folds.
= Cf. Donkersloot-de Vrij 601, listing a variant ms. map by the same engineer and surveyor from 1747. The date of the present copy must also be 1747, a year which is given on recto and on verso in red pencil ("Kaart van de Situatie van Geertruijdenberg met de Inundatie van 1747", but verso also has an annotation in pen and brown ink "Kaart der situatie Gn.denberg met de Inundatie 1784".