He walked up and down, sat and stood, picked up a book at random, discarded it immediately, consulted his instruments without taking his customary notes, and seemed unable to rest easy for an instant.
Il allait et venait, s'asseyait et se relevait, prenait un livre au hasard, l'abandonnait aussitôt, consultait ses instruments sans prendre ses notes habituelles, et semblait ne pouvoir tenir un instant en place.