The Slytherins at the front of the class all looked up eagerly; they loved hearing Snape taunt Harry.
“The Draught of Peace,” said Harry tensely.
“Tell me, Potter,” said Snape softly, “can you read?”
Draco Malfoy laughed.
“Yes, I can,” said Harry, his fingers clenched tightly around his wand.
“Read the third line of the instructions for me, Potter.”
Harry squinted at the blackboard; it was not easy to make out the instructions through the haze of multi-coloured steam now filling the dungeon.
“‘Add powdered moonstone, stir three times counter-clockwise, allow to simmer for seven minutes then add two drops of syrup of hellebore.’”
His heart sank. He had not added syrup of hellebore, but had proceeded straight to the fourth line of the instructions after allowing his potion to simmer for seven minutes.
“Did you do everything on the third line, Potter?”
“No,” said Harry very quietly.
“I beg your pardon?”
“No,” said Harry, more loudly. “I forgot the hellebore.”
“I know you did, Potter, which means that this mess is utterly worthless. Evanesce.”
The contents of Harry’s potion vanished; he was left standing foolishly beside an empty cauldron.
“Those of you who have managed to read the instructions, fill one flagon with a sample of your potion, label it clearly with your name and bring it up to my desk for testing,” said Snape. “Homework: twelve inches of parchment on the properties of moonstone and its uses in potion-making, to be handed in on Thursday.”
While everyone around him filled their flagons, Harry cleared away his things, seething. His potion had been no worse than Ron’s, which was now giving off a foul odour of bad eggs; or Neville’s, which had achieved the consistency of just-mixed cement and which Neville was now having to gouge out of his cauldron; yet it was he, Harry, who would be receiving zero marks for the day’s work. He stuffed his wand back into his bag and slumped down on to his seat, watching everyone else march up to Snape’s desk with filled and corked flagons. When at long last the bell rang, Harry was first out of the dungeon and had already started his lunch by the time Ron and Hermione joined him in the Great Hall. The ceiling had turned an even murkier grey during the morning. Rain was lashing the high windows.
“That was really unfair,” said Hermione consolingly, sitting down next to Harry and helping herself to shepherd’s pie. “Your potion wasn’t nearly as bad as Goyle’s; when he put it in his flagon the whole thing shattered and set his robes on fire.”
“Yeah, well,” said Harry, glowering at his plate, “since when has Snape ever been fair to me?”