A terrible rasping, gurgling noise issued from Snape’s throat.
“Take… it… Take… it…”
Something more than blood was leaking from Snape. Silvery blue, neither gas nor liquid, it gushed from his mouth and his ears and his eyes, and Harry knew what it was, but did not know what to do—
A flask, conjured from thin air, was thrust into his shaking hand by Hermione. Harry lifted the silvery substance into it with his wand. When the flask was full to the brim, and Snape looked as though there was no blood left in him, his grip on Harry’s robes slackened.
“Look… at… me…” he whispered.
The green eyes found the black, but after a second, something in the depths of the dark pair seemed to vanish, leaving them fixed, blank, and empty. The hand holding Harry thudded to the floor, and Snape moved no more.
THE PRINCE’S TALE
Harry remained kneeling at Snape’s side, simply staring down at him, until quite suddenly a high, cold voice spoke so close to them that Harry jumped on his feet, the flask gripped tightly in his hands, thinking that Voldemort had reentered the room.
Voldemort’s voice reverberated from the walls and floor, and Harry realized that he was talking to Hogwarts and to all the surrounding area, that the residents of Hogsmeade and all those still fighting in the castle would hear him as clearly as if he stood beside them, his breath on the back of their necks, a deathblow away.
“You have fought,” said the high, cold voice, “valiantly. Lord Voldemort knows how to value bravery.
“Yet you have sustained heavy losses. If you continue to resist me, you will all die, one by one. I do not wish this to happen. Every drop of magical blood spilled is a loss and a waste.
“Lord Voldemort is merciful. I command my forces to retreat immediately.
“You have one hour. Dispose of your dead with dignity. Treat your injured.
“I speak now, Harry Potter, directly to you. You have permitted your friends to die for you rather than face me yourself. I shall wait for one hour in the Forbidden Forest. If, at the end of that hour, you have not come to me, have not given yourself up, then battle recommences. This time, I shall enter the fray myself, Harry Potter, and I shall find you, and I shall punish every last man, woman, and child who has tried to conceal you from me. One hour.”