Sentence:  He ran on his plump sticks of legs , freezing now and again into the sudden startled attitudes which the camera had <WSD>caught</WSD> and held on the paling photographs , all carefully placed and glued and labeled , resting in the fat plush album in the bottom drawer of the escritoire . 
Meaning of the word marked with <WSD> tags:  perceive with the senses quickly, suddenly, or momentarily