They were too far away to hear what the men were saying, but apparently Maitland was being made the object of reproof. He looked up after a while, and got on to his feet and began talking. They heard the rumble of his excited voice, but again no word was intelligible. Then they saw him raise his fist and shake it at the smiling man, who watched him with a calm, detached interest, as though he were some strange insect which had come into his ken. With this parting gesture of defiance, old Maitland shuffled from the room and the door closed behind him. In a few minutes he came out of the house, not through the doorway, as they expected, but apparently through a gateway on the other side of the hedge, for they saw the gleam of the headlights of his car as it passed.
Left alone, Balder poured himself a drink and apparently rang for one of the servants. The man who came in arrested Dick’s attention instantly. He wore the conventional uniform of a footman, the dark trousers and the striped waistcoat, but it was easy to see, from the way he moved, that he was not an ordinary type of servant. A big man, powerfully built, his every action was slow and curiously deliberate. Balder said something to him, and the footman nodded, and, taking up the tray, went out with the same leisurely, almost pompous, step that had distinguished his entry.
And then it flashed upon Dick, and he whispered into the detective’s ear one word.
“Blind!”
Elk nodded. Again the door opened, and this time three footmen came in, carrying a heavy-looking table with a canvas cover. At first Gordon thought that it was Balder’s meal that was being brought, but he was soon to discover the truth. Above the fireplace, hanging on a single wire, was a large electric lamp, which was not alight. Standing on a chair, one of the footmen took out the lamp and inserted a plug from the end of which ran a wire connecting with the table.
“They’re all blind,” said Elk in a whisper. “And that is Balder’s own broadcasting apparatus, and the aerial is attached to the lamp.”
The three servants went out, and, rising, Balder walked to the door and locked it.
There were another set of windows in the room, looking out upon the side of the house, and one by one Balder closed and shuttered them. He was busy with the second of the three, when Elk put his foot upon a ledge of brick, and, tearing aside the curtain, leapt into the room.
At the sound, Balder spun round.
“Evening, Balder,” said Elk.