Share 'Norton Brothers, British Guiana, and Everard im Thurn'

Hi, I have a colleague who is studying botanical exploration in Latin America and particularly the work of Everard im Thurn, a British author/explorer/botanist/anthropologist, and it would appear photographer - see http://en.wikipedia.org/wiki/Everard_F._im_Thurn. On a major expedition he was accompanied by a photographer from "Norton Brothers". Three images are in the collection at Cambridge an…