"Because I fastened it with great care before I left for Fontainebleau."
"You are sure of this?"
"Positive. It has an awkward catch. You see?"
And she demonstrated how easily it came unlatched unless pressed firmly down.
Monsieur Matthieu came forward smiling.
"You only indicate, Madame, that it will slip easily out of place."
Moira met his gaze firmly.
"Try to make it slip, Monsieur," she said, "since I have fastened it."
He tried by tapping—by shaking the window, but the catch held.
"It is a matter of little moment," he muttered, "since it would be impossible for the murderer to have escaped by this way."