“[t]here is a secret about one of my rooms on which i feel disposed to try an experiment. so, gentlemen, none of you shall know who has the haunted chamber, until circumstances reveal it. i will not even know it myself, but will leave it to chance and the allotment of the housekeeper. at the same time, if it will be any satisfaction to you, i will observe, for the honor of my paternal mansion, that there’s scarcely a chamber in it but is well worthy of being haunted.”
what technique does irving use to build suspense in the excerpt?