“I certainly shouldn’t have guessed that, sir.”

“I don’t suppose you would. Well, that’s what they had. Thirty-nine wedding rings on a cord. They were all much of the same size and value. And there was not another ring. They were searched, but nothing else was found on them.

“Marshall, of course, asked them where they got them, and their answer was more interesting still. It appeared that the victor, James Gray, was the skipper of a Thames lighter and the vanquished, William Fuller, was his ‘crew.’ A third man was on board who looked after the engine, but he didn’t come into the affair. Gray stated that about 8.30 that same evening they were working empty down the river. They had left a cargo of Belgian coal at an up-river works and were running down to their moorings for the night. They usually stopped about six, but trouble with their engine had delayed them on this occasion. It was rather a dirty night, raining and very dark and blowing a little. Gray, the skipper, was at the helm and Fuller was forward acting as look-out. The third man was below at the engines. Just as they began to emerge from beneath the Tower Bridge Fuller heard a smack on the deck beside him. He looked down and in the light of some of the shore lamps saw some bright objects rolling about on the planks. On picking one up he was astonished to find it was a wedding ring. He began to search and found several others, but the skipper swore at him for not minding his job, and he had to let the remainder lie. When they reached their moorings he tried again, but Gray was curious and came forward and found a ring himself. Then they had a proper look with lanterns and recovered the thirty-nine. Immediately, as might be expected, a row broke out. Both men wanted the rings. Fuller said they had fallen beside him and he had found all but one or two, but Gray held that he was skipper and that anything that came on the ship was his. They had to bury the hatchet temporarily so as not to give away the secret to their engineer, but the quarrel broke out again ashore, Fuller’s cries attracting our man. What do you think of that, French? A good story, isn’t it?”

“Like a book, sir. Just a bit humorous too, if you don’t mind my saying so.”

There was a twinkle in Chief Inspector Mitchell’s eye as he continued:—

“Oh, you think so, do you? Well, anyhow, as I say, I was interested. The men’s mentality I found quite intriguing. I wondered how much imagination they had between them. Marshall described them as slow, unintelligent, bovine fellows. Now, such men could never have invented a tale like that. If they had been making it up they would have said they found a bag of rings in the street. The idea of wedding rings having been thrown over the parapet of the Tower Bridge just as they were passing beneath would only occur to men of imagination, and to have got all the details right would have involved a very considerable gift of invention as well. Do you see what I’m getting at, French? Their story shows too much imagination for their intelligences as described by Marshall, and therefore I am disposed to accept it.”

Chief Inspector Mitchell paused and looked at French as if expecting a comment.

“I follow you all right, sir, and what you say sounds reasonable to me. And yet it’s not very likely that any one would throw thirty-nine wedding rings into the Thames off the Tower Bridge, for I take it it was into the river and not on to the boat they were intended to go.”

“I should say undoubtedly.” Mitchell sat for a moment drumming with his fingers on his desk and looking thoughtfully out of the window. “You think the whole thing’s unlikely, do you? Perhaps you are right. And yet I don’t know. I think I can imagine circumstances in which a man might be very anxious to get rid of thirty-nine wedding rings. And what’s more, to throw them over the parapet of the Tower Bridge at 8.30 in the evening seems to me a jolly good way of getting rid of them. How would you have done it, French?”

French glanced at his superior in some surprise. He could not understand the other’s interest in this commonplace story of stolen rings. Still less could he understand why he had been interrupted in his useful and important work to come and listen to it. However, he realised that it would be tactless to say so.