In the Mayor's Parlour by J.S. Fletcher

The discovery of Wallingford's will, which lay uppermost amongst a small collection of private papers in a drawer of the dead man's desk, led Brent and Tansley into a new train of thought. Tansley, with the ready perception and acumen of a man trained in the law, was quick to point out two or three matters which in view of Wallingford's murder seemed to be of high importance, perhaps of deep significance. Appended to the will was a schedule of the testator's properties and possessions, with the total value of the estate estimated and given in precise figures -- that was how Brent suddenly became aware that he had come into a small fortune. Then the will itself was in holograph, written out in Wallingford's own hand on a single sheet of paper, in the briefest possible fashion, and witnessed by his two clerks. And, most important and significant of all, it had been executed only a week previously.

"Do you know how that strikes me? " observed Tansley in a low voice, as if he feared to be overheard. "It just looks to me as if Wallingford had anticipated that something was about to happen. Had he ever given you any idea in his letters that he was going to do this?"