about
midnight
He went into Braegdort 's delicatessen on Sixth Avenue and bought a box of crackers , a tube of anchovy paste , and some oranges , or else a little jar of sausages and some potato salad and a bottled soft drink , and with these in a brown package he went to his room at Fifty-something West Fifty-eighth Street and ate his supper and saw Caroline . Caroline was a very young and gay person who lived with some older lady and was possibly nineteen . She was like a ghost in that she never existed until evening . She sprang into life when the lights went on in her apartment at about six , and she disappeared , at the latest , about midnight . Her apartment was a nice one , in a nice building with a white stone front , opposite the south side of Central Park . The back of her apartment faced the single window of the single room occupied by the single Mr. Grainger . He called her Caroline because there was a picture that looked like her on the jacket of a book of that name down at the Moonlight Quill .