The entrance-door was half-open; she glided in like a shadow, and thanking D'Artagnan by a parting gesture, disappeared from his sight.

When D'Artagnan found himself quite alone, he reflected very profoundly upon what had just taken place.
"Upon my word," he said, "this looks very much like what is called a false position.

To keep such a secret as that, is to keep a burning coal in one's breeches-pocket, and trust that it may not burn the stuff.
And yet, not to keep it when I have sworn to do so is dishonorable.

It generally happens that some bright idea or other occurs to me as I am going along; but I am very much mistaken if I shall not, now, have to go a long way in order to find the solution of this affair.

Yes, but which way to go?
Oh! towards Paris, of course; that is the best way, after all.