And then all of a sudden he was interrupted by a noise. I had found one of the honest hands--well, here, at that same moment, came news of another. Far away out in the marsh there arose, all of a sudden, a sound like the cry of anger, then another on the back of it; and then one horrid, long-drawn scream. The rocks of the Spy-glass re-echoed it a score of times; the whole troop of marsh-birds rose again, darkening heaven, with a simultaneous whirr; and long after that death-yell was still ringing in my brain silence had re-established its empire, and only the rustle of the re-descending birds and the boom of the distant surges disturbed the languor of the afternoon. Tom had leaped at the sound, like a horse at the spur; but Silver had not winked an eye. He stood where he was, resting lightly on his crutch, watching his companion like a snake about to spring. "John!" said the sailor, stretching out his hand. "Hands off!" cried Silver, leaping back a yard, as it seemed to me, with the speed and security of a trained gymnast. "Hands off, if you like, John Silver," said the other. "It's a black conscience that can make you feared of me. But, in heaven's name, tell me what was that?" "That?" returned Silver, smiling away, but warier than ever, his eye a mere pin-point in his big face, but gleaming like a crumb of glass. "That? Oh, I reckon that'll be Alan." And at this poor Tom flashed out like a hero. "Alan!" he cried. "Then rest his soul for a true seaman! And as for you, John Silver, long you've been a mate of mine, but you're mate of mine no more. If I die like a dog, I'll die in my dooty. You've killed Alan, have you? Kill me, too, if you can. But I defies you." And with that this brave fellow turned his back directly on the cook, and set off walking for the beach. But he was not destined to go far. With a cry, John seized the branch of a tree, whipped the crutch out of his arm-pit, and sent that uncouth missile hurtling through the air. It struck poor Tom, point foremost, and with stunning violence, right between the shoulders in the middle of his back. His hands flew up, he gave a sort of gasp, and fell. Whether he were injured much or little, none could ever tell. Like enough, to judge from the sound, his back was broken on the spot. But he had no time given him to recover. Silver, agile as a monkey, even without leg or crutch, was on the top of him next moment, and had twice buried his knife up to the hilt in that defenceless body. From my place of ambush I could hear him pant aloud as he struck the blows. I do not know what it rightly is to faint, but I do know that for the next little while the whole world swam away from before me in a whirling mist; Silver and the birds, and the tall Spy-glass hill-top, going round and round and topsy-turvy before my eyes, and all manner of bells ringing and distant voices shouting in my ear.