John Colter. He was the first of the mountain men who, pushing into the unknown in their search for beaver, opened up the wilderness of the Far West of America. After one short winter in the mountains as a guide to two beaver-trappers, Colter trekked through uncharted land becoming the first to see hot springs, boiling mudholes and geysers. Original artwork for illustration on p31 of Look and Learn issue no 882 (9 December 1978).