When he had read in his chair, no interruption could be counted as a disturbance. In fact, he preferred to read with a little racket in the background. Like the shouts of a vendor in the street; or the scales of a piano in a neighboring apartment; or best of all, footsteps on the stair—footsteps that having quickly ascended two flights would suddenly stop, bang on his door, and breathlessly explain that two friends in a coach-and-four were waiting at the curb. (After all, isn’t that why the pages of books are numbered? To facilitate the finding of one’s place after a reasonable interruption?)

