"But why in Heaven's name did he desire the death of his wretched cousin?"
"Money, Mr. Gebb--money. Alder was desperately hard up--on the verge of bankruptcy; and as his cousin refused to help him, he killed her. To gain her wealth was the motive of the act. Well," added Basson, with a sigh, "he did not enjoy his ill-gotten gains long, for in the midst of his prosperity the hand of God struck him down."
"You have the confession, you say?"
"Here it is!" Basson unlocked the drawer of his desk, and took out a sheet, or, to be precise, several sheets of paper, and handed them to Gebb. The detective turned to the end, saw the three signatures, then slipped the papers into his pocket.
"It will take too long reading this just now," he said apologetically, "and I have much to do. Will you be so kind, Mr. Basson, as to tell me the facts in your own way? I am curious to know how so many people concerned in the case came to be collected in Grangebury on the night of the murder."
"Alder collected them," said Basson, nodding; "he planned the whole affair in a most wonderful manner, so as to throw suspicion of the crime on every one but himself. Had he lived he would have escaped all suspicion."
"I think not," replied Gebb, feeling for the letter he had received from Parge; "his own handwriting would have committed him. This is one of those little accidents which mar the plans of the most accomplished criminals. However, that is neither here nor there. Let me hear the confession."
Basson thought for a moment, then began. "It seems that Miss Wedderburn was not the only person Miss Gilmar wrote to; she corresponded also with Alder about business matters, for, as she had left her property to him by will, she did not think that he would betray her to Dean. As a matter of fact, she was simply putting temptation in the man's way, for Alder was desperately hard up, and was looking forward to the time when he would come into possession of Miss Gilmar's money. However, she did not know that, and kept him advised of her changes of address."
"Did he know that she was in Grangebury?"
"Oh yes; but he did not visit her there, for already he was thinking of getting rid of her by violent means. The difficulty was how to do it without incriminating himself. Then two accidents helped him. The first was that while on a visit to Kirkstone, Edith told him that she was bent on getting the necklace for Arthur Ferris, and was going up to Grangebury on the evening of the twenty-fourth of July to get it. Ferris, she said, was to escort her. Later on, while Alder was still in the hall, Dean told how he had discovered Miss Gilmar's confession, and wished to give it to me. He was afraid, however, to come to my office lest he should be recognized. Afterwards Alder induced me to lecture at Grangebury, and wrote to Dean telling him to come up and see me there. Then he gave Ferris tickets for my lecture, and told him he could wait for Miss Wedderburn in the Town Hall, while she went to see Miss Gilmar. So now you see, Mr. Gebb, that on the twenty-fourth of July Alder had these three people likely to be suspected on the spot."