He was untrue to his principles, but he could not do otherwise.

He had had the courage to decline the duel with Herr von Pechlar, but he had not the boldness to let the foolish gossips of the table d'hote be witnesses of his new love-making.

Why?
For the very simple reason that, in his heart of hearts, he disapproved of his liaison with Pilar.
As he would not give in, the countess resigned herself to what she called his "schoolgirl crotchet," and they traveled together to St.
Valery-en-Caux, another little seaside place several hours' journey from Ault.
Here they took rooms together at a hotel, and wrote themselves down as man and wife.

The countess' letters were forwarded by the postmistress at Ault under cover to Anne.

The only thing that disturbed Wilhelm's peace of mind was the presence of Anne.