There seemed every probability of the voyage being prolonged. Now the wind was contrary, now it again fell calm; and even with a fair wind the tub of a brig seldom made more than five or six knots an hour. The heat of the cabin was such that the midshipmen never remained below longer than they could help, and much of the night was spent on deck. The skipper, on the contrary, seemed seasoned to any amount of heat, and was constantly below.
One night, after a supper of hard, cold, salt beef, which they could only eat by cutting it into the thinnest of slices—mouldy biscuit, rum and muddy water—they went on deck, where they found Casey and Peter, who had been taking a meal of the same description. Excepting the watch, the rest of the crew were below.
“Any chance of our getting in, sir?” asked Casey of Tom. “It is pretty well time we should be there, for I’ve been trying to learn what quantity of water we have got on board. As far as I can make out, we’ve not got a gallon at the most, and that won’t keep our tongues moist for more than a couple of days.”
“I doubt whether the master himself is aware of this,” said Tom, “for he takes the matter very easy, and he ought to have put all hands on an allowance before this. He must do so, or we shall be dying of thirst before we drop anchor in Sydney harbour.”
The brig was at this time under all sail, but the wind was light, and she was making little way. Suddenly her sails gave a loud flap against the mast.
“We are going to have another calm, I fear,” said Desmond.
“I’m not quite so sure of that,” said Casey. “I’ve been watching the sky, and it seems to me as if a thick gloom was spreading over it. I’ve observed a dark bank rising rapidly to the southward and eastward. Look, sir, you cannot see a star in that quarter. If I was the mate, I’d shorten sail at once.”
Tom and Desmond took a survey of the horizon in the quarter to which Casey was pointing. The bank was rising rapidly; it looked, indeed, as if a dark curtain was being drawn over the sky.
“I’ll point it out to the mate,” said Tom.
On going aft, Tom found the mate seated close to the taffrail. Instead of keeping a look-out, he was fast asleep. Tom roused him up, and pointed out the appearance of the sky.