Kathryn Yu: Wedged between 75 and 77 Bedford, 75½ is only nine-and-a-half-feet wide on the outside, eight-and-a-half-feet wide on the inside, and 32 feet deep.
Kathryn Yu: Wear good shoes, contact lenses instead of glasses, and dress lightly. Be prepared to go up and down several flights of stairs. And follow the man with the bloodstains on his clothing.