Mezue ahịrịokwu na-esonụ: O mere ihe osise maka British Museum of Natural History, nakwa maka magazin nke Geological Society of London. O mere ihe osise nke agụ iyi Sumatra nke mụrụ nwa n'ụlọ anụ Charles William Rice na Commercial Road na Disemba 1872. Ọ rụrụ ọrụ dị ka onye na-ese ihe maka Robert Falcon Scott's S.S. "Nchọpụta" njem nke 1901-1904, na
National Arctic Expedition nke 1907-1912.