CHAP. VII"Lone Tree Island," began Blackett, "lies south of Santos. In size it is about five miles north to south, and a little less from east to west. The eastern side has a biggish area of swamp which is practically impassable: the western side is mostly dense tropical forest. The northern part--the map of which isn't here--has one conspicuous conical hill, and west of that hill one even more conspicuous tree standing by itself on high ground."
"That confirms the accuracy of the other part of the map," said Jim.
"The first time I heard of it," went on the other, "was in '06. I was serving then as mate in a small line with its headquarters at Buenos. One day we got sudden orders from the owners to go there, which struck me as being pretty strange, seeing that there was no question of an
