The next traveller of any mark was Robert Schomburgk, who was more or less continuously occupied from 1831 to 1843 in the first comprehensive and thorough exploration...The most interesting results of Robert Schomburgk's work in Guiana the establishment of the actual boundary line of the colony by international agreement, and secondly in the publication of the fact of the existence of a mountain of strange form called Roraima, which Schomburgk was the first to see..'Thoughts Talks and Tramps' The Hinterland of British Guiana. Im Thurn (1934)