Licquet had taken a fortnight to study the affair. His only clues were Flierle's ambiguous replies and the Buquets' cautious confessions, but during the years that he had eagerly devoted to detective work as an amateur, he had laid up a good store of suspicions. The failure of the gendarmes at Tournebut had convinced him that this old manor-house, so peaceful of aspect, hid terrible secrets, and that its occupants had arranged within it inaccessible retreats. Then he changed his tactics. Mme. de Combray and Bonnoeil had gone in perfect confidence to spend the afternoon at Gaillon; when they returned to Tournebut in the evening they were suddenly stopped by a detachment of gendarmes posted across the road. They were obliged to give their names; the officer showed a warrant, and they all returned to the chateau, which was occupied by soldiers. The Marquise protested indignantly against the invasion of her house, but was forced to be present at a search that was begun immediately and lasted all the evening. Towards midnight she and her son were put into a carriage with two gendarmes and taken under escort to Rouen, where, at dawn, they were thrown into the Conciergerie of the Palais de Justice. Licquet was only half satisfied with the result of the expedition; he had hoped to take d'Ache, whom he believed to be hidden at Tournebut; the police had arrested Mme. Levasseur and Jean-Baptiste Caqueray, lately married to Louise d'Ache; but of the conspirator himself there was no trace. For three years this extraordinary man had eluded the police. Was it to be believed that he had lived all this time, buried in some oubliette at Tournebut, and could one expect that Mme. de Combray would reveal the secret of his retreat?