The expression became that of fatigue. [fact]
There was a lunge of abrupt and piercing life in that look, then the eyes were immediately veiled by a kind of whitish film and withdrew under the heavy lids; the expression became that of fatigue, but cunning withal, and concessive: behind this hooded falcon’s immobility, the talons were clearly in readiness.
Julien Gracq, Balcony in the Forest, loc. 30