In December 1884 he led the first successful expedition to the summit of Mount Roraima, in Venezuela's Gran Sabana region, along with Harry Perkins, an Assistant Crown Surveyor who was also living in British Guiana.
Mount Everest | Mount Vernon | Mount Kilimanjaro | Mount Pleasant | Mount Lebanon | Mount Athos | Mount Olympus | Temple Mount | Mount Fuji | Mount Rainier | Mount Celestia | Mount Shasta | Mount Kupe | Mount Hood | Mount Holyoke College | Mount St. Helens | Mount Sinai Hospital | Mount Sinai | Roraima | Mount Kenya | Mount Airy | Mount Vesuvius | Mount Rushmore | Mount Kosciuszko | Mount Carmel | Mount Barker | Mount Panorama Circuit | Mount Isa | Mount Desert Island | Mount Cameroon |
This species is restricted to the transboundary summit of Mount Roraima in Venezuela (inside Canaima National Park World Heritage Site), Guyana and Brazil, and from Wei-Assipo-Tepui in Guyana.