Read it through once

Scarcely were these words uttered when I recollected the association of Heathcliff’s with Catherine’s name in the book, which had completely slipped from my memory, till thus awakened. I blushed at my inconsideration: but, without showing further consciousness of the offence, I hastened to add—“The truth is, sir, I passed the first part of the night in—” Here I stopped afresh—I was about to say “perusing those old volumes,” then it would have revealed my knowledge of their written, as well as their printed, contents; so, correcting myself, I went on—“in spelling over the name scratched on that window-ledge. A monotonous occupation, calculated to set me asleep, like counting, or—”