Five Centuries of Hydrography – An Exhibition on Ancient Charts

De la Grande Rivière du Canada appellée par les Européens de St.Laurens

Jean Deshayes
Bibliothèque et Archives nationales du Québec

This chart is a re-edition of the 1702 map, based on Jean Deshayes‘ own surveys carried out in 1685 and 1686. His hydrographic surveys were established on the first geodetic triangulation network in Canada. Testifying to its great importance and quality, this chart of Deshayes was copied by the Dutchman Gerard Van Keulen around 1717 and also copied and translated into English by Thomas Jefferys in 1776. One find on this chart many textual information (such as those found in modern Sailing Directions) about moorings, tides, currents, etc.