asked the Postmaster-General the number of Continental cities which are directly connected with London by air post; and to what extent does he propose to extend this service?

Mails arc sent to and received from the Continent by three air routes: (1) London-Paris, (2) London-Brussels-Cologne, (3) London-Amsterdam-Rotterdam. If and when any of these routes be extended, arrangements will be made for through air mails from London to the more distant termini.