"Why are you trespassing here?" he demanded. "Don't you know that this is private property? Go, or I will call in the police and give you into custody."
"The police won't help you in this case," Venables said with the air of a military man who is quite sure of his ground. "We are here on Government business. I don't know if you understand what I mean, but we are surveying, and nobody has a right to interfere with us, providing we do no damage. We can come into the house if we like. Indeed, I am not quite sure that we shan't have to. I see you have got a flat roof, sir, with railings round. If we have occasion to take the theodolite up there I will ring the bell and let you know."
The whole thing was so coolly and naturally done that Silva was taken aback for the moment. Evidently he had come out of the house full of suspicion, and with the fixed intention of getting rid of these intruders as soon as possible. There was an uneasy look in his eyes as Venables suggested the roof of the house as the field of action. He deemed it wise to shift his ground altogether.
"That will be very inconvenient," he said, in quite another voice. "I hope you will be able to manage without that if you can. However, if you will give me an hour's notice, I daresay----"
But Walter was no longer listening. He was standing up regarding the house with a professional eye. His gaze vaguely took in a dormer window immediately under the roof. There were bars to the window, pointing to the fact that at some time or another the room had been used as a nursery. The window was blank for a moment, then a face appeared and looked out.
That instant was enough for Walter. There was no mistaking those features. They were those of Vera Rayne.
[CHAPTER XXXIII.]
THE MIDNIGHT MESSAGE.
It was with the greatest difficulty that Walter restrained himself. He dared not look round again until Silva's back was turned and the Italian returned to the house. Even then it would have been impolitic to make a sign, for there might be prying, suspicious eyes looking from other windows who would understand, and then the whole of Venables' ingenious scheme would be wasted. Turning sideways, Walter glanced up again. It seemed to him that he could still catch the outline of Vera's figure. Then a desperate idea occurred to him. He stooped down and went through all the motions of patting and caressing some favourite animal. There was just the outside chance that Vera might take this as an allusion to Bruno, and the knowledge that the dog had put her friends on her track. The girl was sharp and quick enough, and she might easily, in the light of events, guess the identity of the trio on the lawn. Before Walter could speak, Venables glanced in his direction and smiled.
"Well, did you see it?" the former asked.