"What affair?" asked Gouache, more and more mystified.

"You are amazingly slow of comprehension, Monsieur Gouache," observed
Giovanni. "To be plain, I desire to have an opportunity of killing you.
Do you understand me now?"

"Perfectly," returned the soldier, raising his brows, and then breaking into a laugh of genuine amusement. "You are quite welcome to as many opportunities as you like, though I confess it would interest me to know the reason of your good intentions towards me."

If Gouache had behaved as Giovanni had expected he would, the latter would have repeated his request that a pretext should be found which should explain the duel to the world. But there was such extraordinary assurance in the Zouave's manner that Sant' Ilario suddenly became exasperated with him and lost his temper, a misfortune which very rarely happened to him.

"Monsieur Gouache," he said angrily, "I took the liberty of visiting your lodgings yesterday afternoon, and I found this letter, fastened with this pin upon your table. I presume you will not think any further explanation necessary."

Gouache stared at the objects which Sant' Ilario held out to him and drew back stiffly. It was his turn to be outraged at the insult.

"Sir," he said, "I understand that you acted in the most impertinent manner in entering my room and taking what did not belong to you. I understand nothing else. I found that pin on the Ponte Sant' Angelo a month ago, and it was, I believe, upon my table yesterday. As for the letter I know nothing about it. Yes, if you insist, I will read it."

There was a pause during which Gouache ran his eyes over the few lines written on the notepaper, while Giovanni watched him very pale and wrathful.

"The pin is my wife's, and the note is written on her paper and addressed to you, though in a feigned hand. Do you deny that both came from her, were brought by her in person, for yourself?"

"I deny it utterly and categorically," answered Gouache. "Though I will assuredly demand satisfaction of you for entering my rooms without my permission, I give you my word of honour that I could receive no such letter from the princess, your wife. The thing is monstrously iniquitous, and you have been grossly deceived into injuring the good name of a woman as innocent as an angel. Since the pin is the property of the princess, pray return it to her with my compliments, and say that I found it on the bridge of Sant' Angelo. I can remember the very date. It was a quarter of an hour before I was run over by Prince Montevarchi's carriage. It was therefore on the 23d of September. As for the rest, do me the favour to tell me where my friends can find yours in an hour."