"Perhaps," said Moira.
But while she spoke she unlocked the catch, then slipped it insecurely into place and stood aside, studying it keenly.
"What is it that interests you, Madame?" asked the Juge d'Instruction.
"The catch, Monsieur," she replied quietly. "It is an old one. The edges are worn quite smooth." And just then as a breeze came from without, the French window swung gently open.
Monsieur Matthieu started back a pace and glanced at Monsieur Simon.
"You found this window open, Monsieur le Commissaire," said the Judge.
"That is true," replied the Commissaire confidently, "but it is possible that Monsieur Horton may have disturbed it when he examined it before the murder."
Moira turned quickly.
"The window was securely locked. I left it so. Monsieur Horton found it so. You make nothing of this, either, Monsieur le Commissaire?"
Monsieur Matthieu shook his head and pointed toward the opening.