six o'clock
The inconspicuous man surveyed the passing vehicles , and seemed relieved when he discovered an empty taxi-cab going north . He hailed it and entered , giving directions to its guide that entailed much pointing to the large red touring car now a block distant . Thereafter , until late at night , the red car was trailed by the taxi-cab . At six o'clock the car stopped at a place of refreshment overlooking the river , where the trailed youth consumed a modest dinner , which he concluded with a radiant raspberry ice . A little later he reëntered the red car and was driven aimlessly for a couple of hours through leafy by-ways . The inconspicuous man became of the opinion that the occupant of the red car was cunningly endeavouring to conceal his true destination . The car returned to the place of refreshment at nine-thirty , where the young man again ordered a raspberry ice , with which he trifled for the better part of an hour .