Although Arthur was in London, he knew far more about the situation in Paris than Stendhal, who had just arrived in Britain from Paris.
The head of intelligence at Scotland Yard had long been in letter correspondence with Victor, the chief of the Paris Police Prefecture. Moreover, after Heine and Chopin went to Paris, they also often wrote to Arthur to share some of their observations in the city.
Of course, even if these people were willing to exchange information with Arthur, it wouldn't be useful if the information didn't travel fast enough.
Fortunately, Arthur had a friend with the surname Rothschild, so he naturally enjoyed the most time-efficient courier service in Europe at the moment—the Rothschild Express.
