“I dare say you’re right,” he admitted, “but we can easily prevent that. Suppose Leatham arranges for a cargo for some indefinite date ahead, then on the day after the Girondin leaves France he goes to Ferriby and says some other consignment has failed him, and could they let him have the next cargo? That would meet the case, wouldn’t it?”

“By Jove, Merriman, but you’re developing the detective instinct and no mistake! I think the scheme’s worth trying anyway. How can you get in touch with your friend?”

“I’ll phone him now that we shall be over tomorrow to see him.”

Leatham was just leaving his office when Merriman’s call reached him.

“Delighted to see you and meet your friend,” he answered. “But couldn’t you both come over now and stay the night? You would be a perfect godsend to me, for Hilda’s in London and I have the house to myself.”

Merriman thanked him, and later on the two friends took the 6.35 train to Ellerby. Leatham’s car was waiting for them at the station, and in a few minutes they had reached the mineowner’s house.

Charles Leatham was a man of about five-and-thirty, tall, broad, and of muscular build. He had a strong, clean-shaven face, a kindly though direct manner, and there was about him a suggestion of decision and efficiency which inspired the confidence of those with whom he came in contact.

“This is very jolly,” he greeted them. “How are you, old man? Glad to meet you, Hilliard. This is better than the lonely evening I was expecting.”

They went into dinner presently, but it was not until the meal was over and they were stretched in basket chairs on the terrace in the cool evening air that Merriman reverted to the subject which had brought them together.

“I’m afraid,” he began, “it’s only now when I am right up against it that I realize what appalling cheek we show in coming to you like this, and when you hear what we have in our minds, I’m afraid you will think so too. As a matter of fact, we’ve accidentally got hold of information that a criminal organization of some kind is in operation. For various reasons our hands are tied about going to the police, so we’re trying to play the detectives ourselves, and now we’re up against a difficulty we don’t see our way through. We thought if we could interest you sufficiently to induce you to join us, we might devise a scheme.”