 Cape Hoadley was named after him upon discovery by the exploration party.James William Slessor Marr was one of two British Scouts who were selected from 1,700 Scouting applicants to accompany Sir Ernest Shackleton on the 1921 Shackleton–Rowett Expedition.The expedition was curtailed following the death of Shackleton, but Marr later joined the 1929 British Australian and New Zealand Antarctic Research Expedition.