All Walter's apathy had vanished, as he turned to the stage and scrutinised the acrobat long and carefully. So far as he could judge, Valdo was no Englishman with a foreign name, but a genuine foreigner, presumably of Italian birth. The man was not tall or particularly broad, but he was well proportioned, and gave the idea of one possessed of considerable physical strength. In particular, Walter noticed how long his arms were, and how the muscles stood out between his shoulders. As to the rest, the man looked mild enough, and his dark Southern face was wreathed in an amiable smile.
He proceeded, with the aid of an attendant, to fasten two small curved canvas frames to his shoulders. These he thrashed up and down with his arms much as a cock flaps its wings before crowing. Then, with an agile leap from the stage, the man proceeded to sail up slowly from the floor to the flies.
"That's clever," Venables exclaimed. "It looks to me as if our friend has solved the art of the flying machine. But one never knows. I daresay it is no more than some ingenious trick."
This speech appeared to be resented by a respectable-looking mechanic who was occupying the next seat to Venables.
"Nothing of the kind," the man said indignantly. "I've been here three nights now, and I know something about mechanics, too. If you think that wires are used you are just mistaken. A friend of mine is stage carpenter here, and he told me all about it. Depend upon it, that chap has got the knack right enough."
The performer fluttered down again from the wings as lightly and easily as he had risen, and a tremendous outbreak of applause followed. When the din had died away, the stage manager came forward and invited any of the audience who chose to come up and see for themselves that everything was fair and legitimate, and that no mechanism had been employed. The intelligent mechanic turned to Venables with a defiant smile.
"Now is your chance, guv'nor," he exclaimed. "You go and smell it out for yourself."
Venables would have declined the offer, but already Walter had risen eagerly from his seat. The opportunity was too good to be missed. Though he did not associate this man Valdo with the mysterious attack on Lord Ravenspur's life, he felt quite convinced that the artist was indirectly concerned in it. To waste a chance would be the height of folly. A moment or two later the two friends were on the stage. They stood there whilst the performer went through another series of graceful performances, but they could see absolutely nothing which suggested mechanical contrivance of any kind. The whole act came to an end at length, and Valdo stood there bowing and smiling when his wings were removed.