He was among men what the cat is among quadrupeds, the emblem of anxiety and impatience, at the same moment.

A restless cat can no more remain the same place than a silk thread wafted idly to and fro with every breath of air.

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

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 this was, in fact, the very thing that happened.
Baisemeaux had hardly had time to return from the donjon, than D'Artagnan placed himself in ambuscade close to the Rue de Petit-Musc, so as to see every one who might leave the gates of the Bastile.

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 Bastile.