four o'clock exactly
No gloves . No rings . `` In the afternoon , take a cab along the left bank of the river to the church of Saint-Étienne-du-Mont . At four o'clock exactly , there will be , near the holy-water basin , just inside the church , an old woman dressed in black , saying her prayers on a silver rosary . She will offer you holy water . Give her your necklace . She will count the beads and hand it back to you .