Shipwrecks and Castaways -- escape from the island

When the three survivors of the Invercauld were rescued by a passing ship, there was no attempt made to search the island for other castaways.  And so the five Grafton castaways were left to find their own salvation.

Which meant that they had to build their own getaway boat.

They did have the tough old timbers of the schooner, but had no tools.  And so their first move was to build a forge, which was fired with charcoal that they laboriously burned from the tangled shoreside forest.  No only did have to forge their tools, but they had to manufacture thousands of nails .... one by one, by both day and night.

And then, when they finally finished their little craft, they were faced with yet another problem.

But that is not the end of the story ...