“ In 1841 he returned to Guiana to survey the colony and fix the boundary for the British Government. The result was the provisional boundary between British Guiana and Venezuela known as the “Schomburgk Line,” for which see the articles on those two countries. On his return to England he was knighted. In 1848 he was appointed British consul to St Domingo, and, in 1857, British consul to Bangkok. While holding these posts he continued his geographical surveys. He retired from the public service in 1864, and died at Berlin on the 11th of March 1865. ”