Read it through once

Thus engaged, he appeared, sitting in his own recess, quiet and absorbed enough; but that blue eye of his had a habit of leaving the outlandish-looking grammar, and wandering over, and sometimes fixing upon us, his fellow-students, with a curious intensity of observation: if caught, it would be instantly withdrawn; yet ever and anon, it returned searchingly to our table. I wondered what it meant: I wondered, too, at the punctual satisfaction he never failed to exhibit on an occasion that seemed to me of small moment, namely, my weekly visit to Morton school; and still more was I puzzled when, if the day was unfavourable, if there was snow, or rain, or high wind, and his sisters urged me not to go, he would invariably make light of their solicitude, and encourage me to accomplish the task without regard to the elements.