Did Tommy chuckle when he saw David's eyes following her?
No; solemn as a cat blinking at the fire; noticed nothing.

The most worldly chaperon, the most loving mother, could not have done more for Elspeth.

Yet it was not done to find her a husband, but quite the reverse, as we have seen.

On reflection Tommy must smile at what he has been doing, but not while he is working the figures.

The artist never smiles at himself until afterwards.
And now he not only wondered at times how Elspeth and David were getting on, but whether she noticed how he was getting on with Grizel; for in matters relating to Tommy Elspeth was almost as sharp as he in matters that related to her, and he knew it.