The nephew of noted Scottish Arctic explorer Sir John Ross (1777-1856), James Clark Ross accompanied his uncle on his first Arctic voyage in search of a Northwest Passage in 1818. Between 1819 and 1827, Ross then took part in four other Arctic expeditions. Between 1829 and 1833 he again accompanied his uncle on a second Arctic voyage. It was during this trip that they located the position of the North Magnetic Pole on 1 June 1831 on the Boothia Peninsula in the far north of Canada.
Editors. "Three Antarctic voyages by James Clark Ross". The Literary Encyclopedia. First published 01 January 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=4806, accessed 26 November 2015.]