Pursue taxi.

The driver's skill at threading his taxi at speed through the many needle-eyes of London's streets is too great, and after a brief sprint you have to concede defeat. You nevertheless shake your fist after him for a while longer, in the hope that this will give him endless sleepless nights of worry.

The shadowy stranger staggers, panting heavily, alongside you. He takes hold of your arm, gasping for breath, and gives you a painting, wrapped in brown paper.

"You - you take it", he stammers, in an American accent. "Get it to Aveugle".

With that, he limps off into the gloom.

You can:

Chase after him. He has a bad leg, he can't have got far.

Try to find some light so you can take a look at the painting.

Place the painting on the ground and leave it.

Run like hell in the vague direction of away.