Imray 1871 Chart of the coast of Guayana

$275.00

“The Coast of Guayana.” London: J. Imray and Son, [1870]-1871. Separately issued blueback chart; mounted to blue paper and rolled. 25 1/2 x 35 1/2. Engraving. Two corners bent. Otherwise, very good condition.

SKU: 1-2802 Categories: , ,

Description

A rare, working blueback chart showing the northern coast of South American (“Guyana”) from the mouth of the Orinoco (and the southeastern corner of Trinidad) to the eastern border of French Guiana.  Charts like this were intended to be used at sea, and so they were laid onto a blue backing paper and rolled for ease of storage and use.  Though examples of this chart would have been carried by many ships in the mid-nineteenth century, few would have survived.  Not only would such charts be subject to the usual wear from use on shipboard, but it is traditional to destroy (rather than simply put aside) charts once replaced by updated versions, for inaccurate, out-of-date information was too dangerous to be left around for possible inadvertent use.  Typical of bluebacks, this map has precise detail of all the coastlines, with depths, geographic coordinates, shoals, light houses and other navigational information   Included are six inset maps, including the mouth of the Demerara River with Georgetown laid out in plan.