And he said to himself, "She has heard I am going, and she is annoyed, and is not glad to see me." There was a preternatural solemnity about their conversation which neither of them could break through, and in a few minutes they both looked as though they had not smiled for years.
Now Claudius was entirely mistaken.

Margaret had not heard that he was going.

If she had, she would have spoken frankly, as was her nature to do always, if she spoke at all.

Margaret had accepted the Duke's invitation, and intended to keep her word, and she had no suspicion whatever of who the other guests might be.

She foresaw that such a journey would break up her acquaintance with Claudius, and she regretted it; and especially she regretted having allowed the Doctor so much intimacy and so many visits.