‘It will be a purely formal business, I suppose, sergeant?’ the coroner observed as the other rose to take his leave. ‘There are no doubtful or suspicious circumstances?’

‘None, sir. The affair is as clear as day. But, sir, I have been thinking the question may arise as to whether boating should not be prohibited altogether on that stretch of the river.’

‘Possibly it should, but I think we may leave that to the jury.’

The sergeant saluted and withdrew. Again taking the car, he reached the police station as the clocks were striking half-past two. Going to the telephone, he rang up the chief constable—to whom he had telephoned immediately on hearing of the accident—and reported what he had learnt. The official replied that he would be over in time for the inquest.

An hour later the two constables who had been sent to search the lower reaches of the river arrived at the police station. They had found the missing oars, and had taken them to Luce Manor, where they had been identified by Smith, the boatman. They had, it appeared, gone ashore close beside each other nearly a mile below the falls, and two points about the affair had interested the men. First, the oars had been washed up on the left bank, while the other things had been deposited on the right, and second, while all the latter were torn and damaged by the rocks, neither oar was injured or even marked.

‘What do you make of that, Cowan?’ the sergeant asked when these facts had been put before him.

‘Well, I’ll tell you what the boatman says, and it seems right enough. You know that there road bridge above the falls? There’s two arches in it. Well, Smith says he’ll lay ten bob the boat went through one arch and the oars the other. That would look right enough to me too, because the right side is more shallow and more rocky than the other, and more likely for to break anything up. The left side is the main channel, as you might say, and the oars might get down it without damage. At least, that’s what Smith says, and it looks like enough to me too.’

‘H’m,’ the sergeant mused, ‘seems reasonable.’ The sergeant knew more about sea currents than river. He had been brought up on the coast, and he had learnt that tidal currents having the same set will deposit objects at or about the same place. It seemed to him likely that a similar rule would apply to rivers. The body, boat, rudder, and bottom boards had all gone ashore at one place. The oars also were found not far apart, but they were a long way from the other things. What more likely than the boatman’s suggestion that the two lots of objects had become sufficiently divided in the upper reach to pass through different arches of the bridge? This would separate them completely enough to account for the positions in which they were found. Yes, it certainly seemed reasonable.

And then another idea struck him, and he slapped his thigh.

‘By Jehosaphat, Cowan!’ he cried, ‘that’s just what’s happened, and it explains the only thing we didn’t know about the whole affair. Those oars went through the other arch right enough. And why? Why, because Sir William had lost them coming down the river. That’s why he was lost himself. I’ll lay you anything those oars got overboard, and he couldn’t find them in the dark.’