THE PHANTOM #1377 P.20

In Morristown a young explorer, Karyn Kyle, meet the disreputable scientist Adam Freemont to get funding to explore the Iwaki Lake in the jungle, at the bottom of which she believe is a lost treasure.
Freemont agree to finance the project but along comes three of Freemont's rogues, with orders to get rid of her if they indeed find a treasure.
To receive permission from the Jungle Patrol, Kyle must agree to have a patrolman come along. Colonel Worubu is still concerned and ask the Phantom as superior commander of the Jungle Patrol to keep an eye out.

Reprints
This story has been published in the following publications:
"The Vanishing Lake", The Phantom #1377 (2004)
"Iwaki-järven salaisuus", Mustanaamio 5/2004
"Iwakisjøens hemmelighet", Fantomet 5/2004
"Iwakisjöns hemlighet", Fantomen 5/2004