A restless cat no more remains in the same place than a silk thread does which is wafted idly to and fro with every breath of air.

A cat on the watch is as motionless as death stationed at its place of observation, and neither hunger nor thirst can possibly draw it away from its meditation.

D'Artagnan who was burning with impatience, suddenly threw aside the feeling, like a cloak which he felt too heavy on his shoulders, and said to himself that that which they were concealing from him was the very thing it was important he should know; and, consequently, he reasoned that Baisemeaux would not fail to put Aramis on his guard, if Aramis had given him any particular recommendation, and which, was, in fact, the very thing that did happen.
Baisemeaux had hardly had time to return from the donjon, than D'Artagnan placed himself in ambuscade close to the Rue du Petit-Muse, so as to see every one who might leave the gates of the Bastille.

After he had spent an hour on the look-out from the "Golden Portcullis," under the pent-house of which he could keep himself a little in the shade, D'Artagnan observed a soldier leave the Bastille.

This was, indeed, the surest indication he could possibly have wished for, as every jailer or warder has certain days, and even certain hours, for leaving the Bastille, since all are alike prohibited from having either wives or lodgings in the castle, and can accordingly leave without exciting any curiosity; but a soldier once in barracks is kept there for four-and-twenty hours when on duty--and no one knew this better than D'Artagnan.