See What I Did There?

Gaius racks his brain for a clue.

It was Arthur who purloined the knife. Why didn't they think it was him?

Aah! says Gaius. What makes you think it was me?

This! says Stacey, pointing at Gaius's notes.

Sure enough, there is a perfect drawing of the glittering knife, bearing the logo of the National Railways.

Eeh! says Gaius. Aii!

He has incriminated himself. Why did he have to draw tools? The claws alone would have sufficed.

He rummages in his pocket. He finds the glittering knife, and draws it out. The trainee grabs it with a gloved hand and examines it closely.

Uuh! says the trainee, it's dirty.

And blunt, says Stacey severely.

My apologies, says Gaius. It was all in the interests of science.

Well, at least you've given it back, says Stacey, walking away.

Gaius sinks back into his seat, uttering a groan.

Oooooh! How embarrassing.

Have Vello and David been listening?

Vello is half asleep, half awake. His mind races with reasons why Arthur might have put U before O. He remembers vaguely something he wrote once in his Elemens de la Philosophie de Newton. What was it again? Something about an inverse relationship between the wavelength of light and the wavelength of sound.........

David is asleep beside Vello. He seems to be having a dream.

Aah! says David.  Eeh!

Vello elbows his friend.

Yie... yawns David, half waking up.

Go back to sleep, says Vello. You were dreaming.

Uhh... says David. He goes back to sleep and resumes the sweet dream.

Vello is drowsy.

He is nearly asleep.

Then....

Ohh! David ejaculates loudly.

And Vello gets it at last.