Measure the distances here, and you will see that Geneva is the likely place.

It is a good city to hide in.

Moreover the car appears at the corner at daylight.

How does it appear, there?
What road is it which comes out at that corner?
The road from Geneva.

I am not sorry that it is Geneva, for the Chef de la Surete is a friend of mine." "And what else do we know ?" asked Ricardo.
"This," said Hanaud.