six o'clock
`` It is , and you 'll be able to find your trail by the passers-by who whistle that air . '' While talking , the journalist and the detective arrived at the Chateaudun cross-roads . Juve cast an eye over the ground . `` It 's six o'clock . Be off and prowl around Notre Dame de Lorette . Loupart will probably come out of that wine-shop you see to the right . You can easily recognise him by his height and a scar on his left cheek . ''