Charles Curtis was an English botanist who was sent by James Veitch & Sons to search for new plant species in Madagascar, Borneo, Sumatra, Java and the Moluccas, before settling in Penang, where he became the first superintendent of the Penang Botanic Gardens.

David Burke was one of the most widely travelled plant collectors, who was sent by James Veitch & Sons to collect plants in British Guiana, Burma and Colombia. In his later life, Burke became rather eccentric, preferring the privations of life away from his native England.