In this subterranean chamber beneath the printing office they found a fine continuous-wave transmission set of one-and-a-half kilowatt power, together with its generator. Apparently the printing office had been established as a blind, so that the neighbours should believe the noise to be that of printing machinery.
Then they searched for the aerial wires, but it was a long time ere they discovered them. At last, to their great surprise, they found them very cunningly concealed behind and about an enormous sky-sign which, illuminated at night, advertised the merits of a certain brand of cocoa, a sign which Geoffrey had noticed nightly, never dreaming, of course, that the secret lay hidden up there.
The two prisoners who were proved to be dangerous emissaries of the Moscow Bolsheviks, were convicted, and sentenced to long terms of imprisonment for establishing secret wireless against the laws of Denmark, the result being that the world has ever since been spared the dissemination of the poisonous Bolshevik propaganda.
And the credit of its suppression was certainly entirely due to Geoffrey Falconer.
CHAPTER VIII
THE GREAT INTRIGUE
“Hulloa? Hulloa? Hulloa? Hulloa, Croydon? Brussels calling!” cried Geoffrey Falconer one afternoon over the wireless telephone at the aerodrome just outside Brussels. “It’s Falconer speaking. Changing over.”
“Hulloa, Falconer? Yes,” came a clear voice through the ether. “Changing over.”
“Oh, it’s you, Heddon. Would you please ask Dennis to speak to me if he’s there?” said Falconer.
“Right-o! Stand by, and I’ll try and get him. Switching off.”