In White Raiment by William le Queux

With untiring astuteness I watched every movement of the new-comer, but detected nothing suspicious in his actions. We lunched together, only five of us, the others being away at Dodington, and were a merry party. The man with the small eyes was excellent company, full of witty sayings and droll stories, and was really an acquisition to our party.

Yet I noticed that he spoke little with Beryl, as, though some secret understanding existed between them. And when he did address her she answered him vacantly, as though her thoughts were afar off.