Do you need the London map, or can you play with only the directory?

Question

Accepted Answer

You need the map. The directory often gives only a partial address, and some cases depend on where places sit or on travel times between them. The map is a paper reference, not a board you play pieces on.

Sherlock Holmes Consulting Detective: The Thames Murders & Other Cases

Do you need the London map, or can you play with only the directory?