"You have no cause to do so; there is absolutely nothing to connect him with the crime." "What about his agitated demeanour?" "Pooh, pooh!" cried Torry briskly. "Of course the man was agitated on hearing of Grent's terrible death. You can't judge a man in such circumstances. Now, to my mind, the fainting of Vass at the sight of the mummy is more suspicious." "I thought he explained that?" "He does--and in a way likely to upset my theory. Vass declares that he saw the Blue Mummy on Grent's table; and it was the sight of it again in connection with the crime which made him faint. The explanation is rather feeble. Still, if Grent had the mummy in his possession, he could not have received it from his assassin; and if he did not, how was it found beside his dead body." "I can't say," admitted Darrel thoughtfully; "but of one thing I am certain: that the Blue Mummy is the clue to the whole mystery. What about Captain Manuel?" "Why do you mention him?" asked Torry abruptly. "Well," said Frank slowly, "it seems to me that the double tragedy has to do with Peru. Everywhere we turn we are met by Peru. In the first place, the mummy is a tomb image from the sepulchre of some Inca of Peru. In the second, the knife discovered was a Spanish-American bowie, which could only have come from the New World. In the third, Grent's wife and adopted child are Spanish ladies from Lima. Finally, Captain Manuel is from Peru, and is the confidential friend of the dead man. What do you make of all this?" "That Grent was murdered by Manuel?" sneered Torry. "No; but that we must look in South America--in Peru--in Lima for the motive of the crime. Grent was there many years ago; he brought home a Spanish wife; so who knows but what he might have made some enemies there who swore to kill him, and accomplished the tragedy of the other night." "That might explain Grent's death," said Torry, nursing his chin in his hand, "but it does not reveal why this unknown woman should have been killed. Yet I am sure that the same motive will account for both deaths. Oh!" cried the detective, in despair, "If I could only find out that motive." "Question Donna Inez," suggested Darrel. "She, if anyone, will explain the reason." "Why so?" "Because if my theory is correct she may remember if her husband made enemies in Peru." "Peru! Peru! You have that Peru on the brain. No," said Torry, "I may see Donna Inez later, but first I intend to search the rooms of Grent." "The chambers in Duke-street?" "Yes. Leighbourne is going to meet me there this afternoon, and we are going all through Grent's private papers in search of a possible clue." "I wonder you did not search there before." "There was no time," replied Torry tartly. "I have had a lot to do in getting evidence for the inquest. Now that is over, and the victims are buried, I can go forward." "It is a week since the murder," said Frank, "and someone may have been in Grent's chambers to remove all incriminating papers."