As soon as he arrives at the hotel in London, Hofmann asks reception for a tourist map. His intention is to immerse himself in the city during his short stay. He has a blank notebook at his disposal. Because he doesn't want to leave any part of the city behind, he counts the number of pages in the notebook and selects the same number of squares on the map at regular intervals. 

In three days, he will organise his walks to pass through the centres of the squares he has identified. There, he will pause briefly to draw the landscape in front of him. As this is the United Kingdom, the drawing will be done with the left hand, as is logical.