tonight. By the way, a gardener has been clipping ivy round the house. Tommy, I saw where he put the ladder .”
“Good for you, Tuppence,” said her husband appreciatively. “Then tonight—”
“As soon as it’s dark—”
“We shall see—”
“What we shall see.”
Tommy took his turn at watching the house whilst Tuppence went to the village and had some food.
Then she returned and they took up the vigil together. At nine o’clock, they decided that it was dark enough to commence operations. They were now able to circle round the house in perfect freedom. Suddenly Tuppence clutched Tommy by the arm.
“Listen.”
The sound she had heard came again, borne faintly on the night air. It was the moan of a