The two officers, clad in oilskins and precious little else, were keeping the first watch. There was nothing doing in the wireless-cabin. Atmospherics were present, but, apart from these disturbances, no sound had been audible in the telephones during the best part of Peter's watch. Insufferably hot, he had put on an oilskin and had gone out for a breather.

"No need," he replied. "At least not until we get forked lightning."

"I'm not sorry we've got shot of that steelwork," remarked the Acting Chief after a pause. "It's awkward stuff to carry. But the trouble of it is that removing it has altered our deviation. The compass cannot possibly be the same with that enormous amount of metal taken out of the ship. I suggested to the Old Man that we ought to have swung the old hooker before we left Bulonga and adjusted compasses. But he was in a hurry to get under way, and, apart from that, the harbour was so shallow that we couldn't get a clear swing. She's not far out on this bearing. I took a sight at the Southern Cross for that. Talking of compasses: did you hear that yarn about the Flinder's bar?"

"About the candidate for Mate's certificate who told the examiner that: 'There ain't no pub o' that name in Gravesend'?" asked Peter.

"No, but that's not so dusty," replied Preston. "My yarn concerns an old skipper in the Penguin Line. He was——"

But Mostyn was not to hear the anecdote.

A violent concussion, as if the ship had struck a rock, almost threw the two men off their feet. A muffled report followed.

"Mined, by Jove!" exclaimed Preston, in the brief lull that succeeded the detonation.

Then pandemonium was let loose. The lascars, yelling and shouting, poured on deck, followed by a mob of native firemen. Capable enough in ordinary circumstances, the Indians lacked the stolidity and grim courage of British crews when disaster, sudden and unexpected, stared them in the face.

Captain Bullock was quickly on the bridge. He could do little or nothing to allay the panic, for the native petty officers were as frantic as the rest. To add to the difficulties of the situation, every light on board went out. Vast clouds of smoke and steam were issuing through the engine-room fiddleys. The propeller was slowing down. The engineer on watch had, on his own initiative, cut off steam and opened the high-pressure gauges.