and all the stuff he told at the police-court, was bluff—carefully concocted by himself and Cortelyon in case Cave was ever put in a tight corner. Now, according to what she tells me, Miss Penkridge immediately spotted something about that letter which none of you gentlemen were clever enough to see—"
"I know!" interrupted Viner. "She saw that the envelope and paper had been supplied by Bigglesforth, of Craven Gardens, and that a certain letter in the typewriter which had been used was defective."
"Just so," laughed Drillford, "and so, being, as I say, a smart woman, she went round to Bigglesforth, got him to herself, and made some inquiries. And—it's very queer, Mr. Viner, how some of these apparently intricate cases are easily solved by one chance discovery!—she hadn't been talking to Bigglesforth ten minutes before she was on the right track. Bigglesforth, when he'd got to know the main features of the case, was willing enough to help, and your aunt immediately brought him round here to see me. And I knew at once that we'd got right there!"
"Yes—but how, exactly?" asked Viner.
"Bigglesforth," answered Drillford, "told me that he'd supplied stationery to Dr. Cortelyon for some time, and he'd no doubt that the paper and envelope described by Miss Penkridge was some which he'd specially secured for the Doctor. But he told something far more important: Six months ago Cortelyon went to Bigglesforth and asked him if he could get him a good second-hand typewriter. Now, Bigglesforth had a very good one for which he'd no use, and he at once sold it to Cortelyon. Bigglesforth didn't mention the matter to his customer, for the machine was
