“How far up the river did you go?” asked Titty.
“As far as the lagoon,” said John. “I’ve marked that.”
“Put in the octopuses,” said Roger.
“I’m no good at drawing octopuses,” said John, when he had done his best.
The chart began really to look like a chart. North and south of the part of the lake they knew were dotted lines and the words “Uncharted waters” or “Unexplored.” “It’s no good putting in what we don’t know,” said John. “But of course we must put in mountains, where you can see them from the parts we have explored.” John began drawing little anchors at all the ports where the Swallow had called. There was one by the island off Rio, and one at Rio itself, and one in the Holly Howe Bay, and one in Shark Bay where Roger had hooked and lost his big fish, and one at the point where they had landed to visit the charcoal-burners, and one at the landing for Dixon’s Farm.
“What about the place where I anchored in Amazon ?” said Titty.
“Yes, that ought to go in,” said John, and a little anchor was drawn close to the north end of Cormorant Island.
“There ought to be a Treasure Island,” said Titty, “but the one that’s got treasure on it has got a name already.”
“Which?” said John.
“Cormorant Island.”
“But there’s nothing there but cormorants.”