Blocking of Amsterdam, by troops of prince Willem the 2nd, from July 30th till August 4th 1650. The enlargement shows troops near a small lake between Ouderkerk and Amsterveen.

Positions of troops near Ouderkerk and Amsterveen.

Map of a part of North-Holland from Muijderberg to Haerlem and from Oostzanen to Amstelveen, with indications of troops of Willem II. The enlargement shows troops near Ouderkerck.

Map of a part of North-Holland from Muijderberg to Haerlem and from Oostzanen to Amstelveen, with indications of troops of Willem II. The enlargement shows troops near Ouderkerck.

VLTRAIECVM DOMINIVM Excudit Guiljelmus Blaeuw – map of the province Utrecht from the Atlas Novus of Willem Jansz. and Joan Blaeu (dated about 1650). In the upper left corner of the map the Bancke Meer is located. Source: Library of the University of California Los Angeles.

Rhinolandia, Amstelandia et Circumiacent aliquot territorioru. accurata desc (?) by J. Janssonius from about 1650. The name of the lake is not readable on this image.

The Banckeraes lake.