How did Robinson Crusoe preserve his gunpowder?

It's
vital for Crusoe's survival that he preserve his supplies of gunpowder. For one thing, he'll
need it to load his gun when he goes huntingfor without being able to hunt on this remote desert
island, he's sure that he'll starve to death. Also, Crusoe will need to have gunpowder in order
to ward off any natives that might be in the vicinity. If there are such people on the island,
chances are they won't be very glad to see a stranger like Crusoe in their midst.

Despite the gunpowder's importance, however, Crusoe is a little slipshod in protecting
it. It's only after he's secured his other provisions inside a tent that he realizes what he's
forgotten to do. A sudden thunderstorm, complete with a flash of lightening, brings home to
Crusoe how easily his stock of gunpowder can be ruined by the elements. Either it can be damaged
by the rain or explode if struck by lightening.

So to protect his stock of
gunpowder Crusoe comes up with the idea of dividing it up into little bags and boxes. This way,
if the weather should turn nasty, Crusoe will lose, at worst, only some of the gunpowder and not
all of it.