“Can I gain admittance by stealth or cunning?”

“Impossible.”

“Then there is only one way open to me. I must have the owner of the castle invite me to it.”

“That is surely an original method.”

“And how easy! Let us suppose that one day the owner receives a letter warning him that a notorious burglar known as Arsène Lupin is plotting to rob him. What will he do?”

“Send a letter to the Procureur.”

“Who will laugh at him, because the said Arsène Lupin is actually in prison . Then, in his anxiety and fear, the simple man will ask the assistance of the first-comer, will he not?”

“Very likely.”