“Bah!” declared Holmes, “they weren’t even necessary. In the chart in the book of the National Library, the drawing terminates at the left, as you know, in a circle, and at the right, as you do not know, in a cross. Now, that cross must refer to the chapel in which we now stand.”
Poor Devanne could not believe his ears. It was all so new, so novel to him. He exclaimed:
“It is incredible, miraculous, and yet of a childish simplicity! How is it that no one has ever solved the mystery?”
“Because no one has ever united the essential elements, that is to say, the two books and the two sentences. No one, but Arsène Lupin and myself.”
“But, Father Gélis and I knew all about those things, and, likewise—”
Holmes smiled, and said:
“Monsieur Devanne, everybody cannot solve riddles.”
“I have been trying for ten years to accomplish what you did in ten minutes.”
“Bah! I am used to it.”
They emerged from the chapel, and found an automobile.