Harry Potter and the Cursed Child

ALBUS: He always said — it’s the only thing he had from her. Look at the love with which she’s
put it on him — I think he’d like to know about that — I wish I could tell him.
SCORPIUS: And I wish I could tell my dad — well, I’m not sure what. I think I’d like to tell him
that I’m occasionally capable of more bravery than he might think I am.
ALBUS has a thought.
ALBUS: Scorpius — my dad still has that blanket.
SCORPIUS: That won’t work. If we write a message on it now, even really small, he’ll read it too
soon. Time will be spoilt.
ALBUS: What do you know about love potions? What’s the ingredient they all contain?
SCORPIUS: Amongst other things, pearl dust.
ALBUS: Pearl dust is a relatively rare ingredient, isn’t it?
SCORPIUS: Mainly because it’s pretty expensive. What’s this about, Albus?
ALBUS: Dad and I had a fight on the day before I went to school.
SCORPIUS: This I am aware of. I believe it kind of got us into this mess.
ALBUS: I threw the blanket across the room. It collided with the love potion that Uncle Ron gave
me as a joke. The potion spilt and the blanket was covered in it and I happen to know for a fact
Mum hasn’t let Dad touch that room since I left it.
SCORPIUS: So?
ALBUS: So it’s coming up to Hallows’ Eve in their time as well as ours — and he told me he
always finds that blanket, he needs to be with it on Hallows’ Eve — it was the last thing his
mum gave him — so he will look for it and when he finds it . . .
SCORPIUS: No. Still not getting you.
ALBUS: What reacts with pearl dust?
SCORPIUS: Well, it is said that if tincture of Demiguise and pearl dust meet . . . they burn.
ALBUS: And is tincture of (he’s unsure how to say the word) Demiguise visible to the naked eye?
SCORPIUS: No.
ALBUS: So if we were to get that blanket and write on it in tincture of Demiguise, then . . .
SCORPIUS (eureka): Nothing would react to it until it came into contact with the love potion. In