Cam takes one drop. "How long does it take to kick in and how long does it last?"

"The effects should begin within a minute and fade after twenty or so. If you wish, you could start producing tall tales now and wait for it to become more difficult."

"I am a medium sized schooner crewed by catpeople with the ability to bake creme brulee," attempts Cam. "I have lived on the Moon ever since the second wave of coOloniz oh this is odd. My eyes are bbbbbbbbbbbruenwnbbb there are two of them. Wow." He coughs. Slowly, "I had cotton candy for breakfast. My best friend is a Neanderthal."

Well that's sure a thing that's happening.

Dumbledore golf-claps. "A very impressive first showing, I must say." 

"Thanks! D'you want to try this stuff, Harry?"

"Um, no thanks. I think Professor Dumbledore's advice is helping, and the potion can't tell me what I'm doing wrong."

"Suit yourself." Cam pockets it for later experiments.

Harry and Dumbledore are going to keep practicing for a while, but it's fine if Cam leaves.

Cam sits and documents his experience in writing before changing venues but then excuses himself.

In the hallway outside Dumbledore's office he encounters an owl! It lands on a suit of armor and hoots at him, sticking out one leg to  display an envelope tied to it.

"Gosh, aren't I glad I had advance warning about you." Will the owl stand to be petted while he takes the envelope?

It will, but it will also check his hand for food and hoot in a slightly disappointed tone when none is present.

Does the owl want, uh, Purina Owl Chow... no Purina Owl Chow, really? ...this dead shrew.

Abs-owl-utely. Om nom cronch, pleased coo. It glides off down the hallway with owly grace.

His letter is the contact information (address and "floo label") of a witch who can turn the basilisk corpse into (from her perspective) its component substances, and (from Cam's perspective) a pile of gold coins. Also, the information that the local currency is magically distinguishable from counterfeit and he should use the money thus obtained if he wants to buy anything.

Well then. Cam writes a letter to this address indicating that the basilisk is available at Hogwarts, died on thus and such a date, and can be hers for the going rate. "Owl? Hey owl?" he calls.

That owl is long gone, but the note also mentions that there are school owls in the owlery up the south tower.

South he goes, then.

The owlery has a lot of wide-open windows and a faint smell of owl. Post owls seem to have more variety or flexibility in their sleep schedules than regular ones; some of them are alseep and some of them are swooping in and out hunting and some of them turn to stare at him.

He offers a staring screech owl his note.

It inspects the address and lets him tie the letter to its leg before taking off. 

An extremely tiny, extremely blonde girl with huge eyes slips into the owlery behind him and smiles. "Oh, hello. You're that man from the other universe, aren't you."

"That's me, hello."

"You've scared off all the nargles. It's very convenient."

"I've scared off the what? Sorry, in my universe I don't think we have those and I don't seem to have got it as a new vocabulary word in transit."

"It's alright, most people don't know about them. They're little creatures that live in plants and steal things."