Perhaps you didn't like some of the things you saw. Perhaps you liked them a great deal. Perhaps it's past time you learned the darker secrets of the Velocipede Squad.

You look over your notebooks. Something is definitely not right. You'll have to observe more closely. The secrets of the Squad won't be secret for much longer!

But what's this? The Knuckle-Scarred Inspector wants to see you outside the station. On the pavement, the station's mechanical engineer is making tiny adjustments to a... Good Lord! A ratwork velocipede! A contraption of steel and brass, the fastest thing on one large and one small wheel in all of London. 'For sterling service,' says the Inspector. 'Don't break it.'