He must be alone.

If he neglects the invitation his life will be in danger.

Let him show this to no one, or he will ruin a woman who loves him: Black Michael does not pardon." "No," observed Sapt, as I ended, "but he can dictate a very pretty letter." I had arrived at the same conclusion, and was about to throw the letter away, when I saw there was more writing on the other side.
"Hallo! there's some more." "If you hesitate," the writer continued, "consult Colonel Sapt--" "Eh," exclaimed that gentleman, genuinely astonished.

"Does she take me for a greater fool than you ?" I waved to him to be silent.
"Ask him what woman would do most to prevent the duke from marrying his cousin, and therefore most to prevent him becoming king?
And ask if her name begins with--A ?" I sprang to my feet.

Sapt laid down his pipe.
"Antoinette de Mauban, by heaven!" I cried.
"How do you know ?" asked Sapt.
I told him what I knew of the lady, and how I knew it.