At first Darrel had been unwilling to come, or even to continue his partnership with the detective in following up the various clues now in their possession. He excused himself on the ground of incapabilities.

"I cannot assist you in any way," he urged. "I see now that the unravelling of an actual criminal problem is far more difficult and complex than I thought. I have not your indomitable perseverance, and the rebuffs which never daunt you, make me nervous and doubtful."

"Nonsense! nonsense!" cried Torry cheerfully.

"I've set my heart on your going through with this. After all, why should you be discouraged; we have found out a good deal."

"Have we?" said Darrel sceptically.

"Of course. We have learnt that the dead man's name was Jesse Grent; that he was attempting to fly with a woman and ten thousand pounds, and that he was killed, probably by the lover of the woman whose name we have yet to discover. Also, we have learnt that the stolen money belongs to a secret society who use the image of a Blue Mummy as a token. Come now, I think all these discoveries are very encouraging."

"They would be if you could prove them," replied Darrel, "but you are mingling fact and fancy. You cannot prove that Grent stole the money, and, indeed, on the face of it--if Vass is to be believed--he is innocent. Also you cannot say for certain if Grent intended to fly with a woman, or that he was killed by her lover. Finally, although I admit on the authority of Manuel that a secret society exists we don't know its aims, nor do we know that the Blue Mummy has anything to do with it."

"So there, now," cried Torry smiling, "you knock down my fine castle of cards with your relentless logic. Never mind, build it up with future discoveries, stronger than ever. Come and help me to lay the first card."

"The first card?"

"The first brick, if you are so particular," said the detective testily. "In plain English, come down to Wray House and assist me to question this young lady about the hat."