It might have been an empty house. The windows were all shuttered, the columns on either side of the small portico were defaced by scribblings in red chalk and pencil, the white front door needed a coat of paint. Dust, and dead leaves from one of the little trees that struggled for existence along the avenue, had blown against the sill, which was almost flush with the street.<br />The house seemed to have two front entrances, one above the other; a not uncommon sight even on Park Avenue since the days when all these dwellings had lost their high stoops in the interests of city development. They had been remodeled in various ways, and this house in the quickest, cheapest and easiest way&mdash;by constructing a new front door in place of a basement window, closing up the old storm doors above, and placing an ornamental rail around the old original doorstep; thus simulating a little balcony.<br />Gamadge, looking up at the dark front windows in the twilight of the December afternoon, guessed that Miss Paxton, temporarily residing there as a sort of honorary agent and caretaker, used back rooms for the sake of quiet. But he reflected, looking up and down the avenue, that this was as quiet a stretch as you could find in New York; far uptown, with private houses&mdash;some of them empty&mdash;on both sides of the way.