Malipieri did not believe a word of what he said, but the tone was very apologetic.

"The cellars are flooded," said the porter, speaking over Volterra's shoulder.

"I know it," Malipieri answered. "I was going to inform you of that this morning," he continued, speaking to the Baron. "I do not think that the police are necessary to our conversation," he added, smiling at the detective.

"I beg your pardon, sir," answered the latter, "but we are here to ask if you know anything of a grave accident to a certain Signor Sassi, who was taken from this palace unconscious, yesterday afternoon, at about a quarter to six, by a very large man, who would not give any name, nor any explanation, and who was consequently arrested."

Malipieri did not hesitate.

"Only this much," he replied. "With the authority of the Senator here, who is the owner of the palace, I have been making some archaeological excavations in the cellars. Signor Sassi was the agent—"

"I have explained that," interrupted the Baron, turning to the detective. "I will assume the whole responsibility of this affair. Signor Sassi shall be well cared for. I shall be much obliged if you will leave us."

He spoke rather hurriedly.

"It is my duty to make a search in order to discover the motive of the crime," said the detective with importance.

"What crime?" asked Malipieri with sudden sternness.