JL's source for his novel 'Star Rover' Jack London

At Star Rover, JL at first tried to use Chong Mong-ju as main character instead of using the name of Yi Yong-ik.

"But I must baseten, for my narrative is not of Adam Strang the shipwreccked sea-cuny on a coral isle, but of Adam Strang, later named Chong Mong-ju (lined) Yi Yong-ik, the Mightty one, who was, one time favorite of the powerful Yunsan, who was lover and husband of the Lady Om of the princely house Min, and ... "

See his JL1194, chapter 15, p. 524.