They may have noticed something unusual in him--perhaps that he was brooding." "Wilkins did say that Lord Loudwater seemed upset at dinner, and that he was frowning most of the meal," said Mr.Flexen.
"That wasn't unusual," said Olivia somewhat pathetically.

"Besides--" She stopped short, on the very verge of saying that she was sure that those frowns cleared from her husband's face before the sweets, for he would never take afternoon tea, in order to have a better appetite for dinner, and consequently was wont to begin that meal in a tetchy humour.
Such an explanation would have gone no way to support the hypothesis of suicide.

Instead of making it she said: "Of course, he did seem frightfully upset." "But you don't think that he was sufficiently upset to do himself an injury ?" said Mr.Flexen.
Olivia had formed a strong impression that her husband would not in any circumstance do himself an injury; it was his part to injure others.
But she said: "I can't say.

He might have gone on working himself up all the evening.

I didn't see him after he left my dressing-room.