Mr Monkey thought that he might try mudlarking, to see if there were any treasures to pick up from the exposed bed of the river. Then he remembered he wasn't a Victorian urchin, and that he didn't like getting dirty, and decided to look at the dome of St Paul's Cathedral while Mr Rik pretended to search for things.
You can read about mudlarking at the East London History website.
Copyright Rik Shepherd and Mr Monkey.