Yates saw the movement, and knew exactly what it meant.

He only hoped that Mr.Belcher had not seen it, as, indeed, he had not, having been at the moment on his way upstairs.
Yates knew that, with his good clothes on, the keen lawyer would give but one interpretation to the change, and that any hope or direct plan he might have with regard to ascertaining when the boy was received into the family, and where he came from, was nugatory.

He would not tell Mr.
Belcher this.
Mr.Balfour called his wife to the window, pointed out the retreating form of Yates, gave utterance to his suspicions, and placed her upon her guard.

Then he went to his office, as well satisfied that there was a mischievous scheme on foot as if he had overheard the conversation between Mr.Belcher and the man who had consented to be his tool..