Tanner left Lincoln’s Inn, and after making a call at the Yard, took the next train back to Halford.

Chapter V.
Inspector Tanner Becomes Convinced

After dinner that same evening Inspector Tanner, having lit his pipe, and selected the most comfortable arm-chair he could find, set himself to take stock of his position, and see just where he stood with his new case.

He realised that the lawyer’s communication contained food for thought. Certainly a lot of the information he had gained seemed to point in a rather unmistakable way to Austin. That the latter had murdered his father he felt it hard to believe, and yet he had known men to be convicted on slighter evidence than that he already held. Absent-mindedly pressing down the tobacco in his pipe, he closed his eyes, and tried to view the facts he had learnt in a proper perspective.

Here was a son who had never been able to get on with his father, so much so that they could not live in the same house. To the father he had been a continual disappointment, and no doubt that irritation would show in the father’s manner, and could not but increase the bad blood between them. It was true they had agreed to differ, and Sir William had allowed Austin £1000 a year, but agreeing to differ did not necessarily prevent very unpleasant feelings on both sides, and as for the money, though it seemed handsome at first sight, it was very small compared to what Sir William might have paid without missing it.

From what Tanner had seen of Austin and his villa, he thought the latter must be living at the rate of well on to a thousand a year. That was to say, nearly at the rate of his income. Under these circumstances he falls in love and decides to marry. The lady would have but a small dot, if any. The two of them must therefore live on what had before been enough for Austin only. What does Austin do? He sees his father the day after the engagement, probably to tell him the news, and possibly to ask for an increased allowance. As in the ordinary course of nature a large portion of Sir William’s money would soon become his in any case, this would not be an unreasonable demand. But what does Sir William answer? Tanner could only surmise, but from what the dead man had said to Mr Arbuthnot it was probable he had not only refused the increase, but had threatened altering his will adversely to Austin if the marriage took place. If, as appeared possible from the words overheard by Innes, Sir William had said anything derogatory to the lady, Austin’s feelings, already considerably aroused, would probably reach white heat. At all events, whether the interview between father and son had or had not taken this course, it was bed-rock fact that they had quarrelled about some woman.

Tanner continued his surmises. Assuming he was correct so far, Austin would inevitably be faced with a very terrible temptation. If his father should die without altering his will, it would mean £150,000 to himself. £150,000! Quite a respectable sum of money! There would then be no question of love in a cottage with Miss Drew. He could give her all those things which men delight to give women. And the irritation of the constant unpleasantness with Sir William would be gone. The more Tanner considered the matter, the more powerful he felt this temptation would have been. Many a stronger man than Austin seemed to be had succumbed to less.

Then coming down to details. The murderer had unquestionably known his way about Luce Manor. He had either gone to the library by the side door, and there committed the crime, carrying the body down to the boathouse, or, more probably, he had devised some scheme to make Sir William go there of his own accord. He had also taken the particular oars belonging to the boat used. All the knowledge necessary for this Austin of course possessed.

But more suspicious than that, Austin by his own showing had actually taken a boat down the river on that night, and the hours of leaving and returning were such that he would just have had time to reach the Luce Manor boathouse, commit the murder, and return the boat to the club. Of course, he had claimed to have an alibi for this period, but alibis could be faked, and the very readiness and apparent completeness of this seemed to Tanner slightly indicative of prearrangement.

There was then the question of the oars. This also had a suspicious look. At first Tanner had accepted without question the boatman’s theory that the boat and oars had become separated in the upper channel and had passed down to the falls through different arches of the road bridge. Indeed, his own inspection of the place had led him to the same conclusion. And this losing of the oars had seemed to explain adequately enough how the accident happened.