Anthony smiled. “Thank you, Sir Austin. Well, after a time—the theory I had formed concerning Alan Warburton developed as I expected it would and I was able to dispose of my blackmailing case quite smoothly. You will understand what I mean very shortly. Meanwhile, Bannister delivered himself into my hands! Miss Delaney as all of you here know had a nurse-companion—she was first mentioned to Bannister and me by Daphne Carruthers—down at Seabourne. She spoke of her surname as ‘Kerr’—but she pronounced it ‘car’ as in motor-car. Now I submit that anybody hearing that surname and having no knowledge of the spelling would ordinarily assume it to be ‘_Carr_’—by far the commoner form of the two. Certainly I did. But when she came in answer to his telegram I happened to get hold of it and noticed that Bannister had actually telegraphed to her as ‘Kerr’—so I got her to write her name down on an envelope for me. She wrote it ‘Kerr.’ _He had addressed her in that form because he knew her name, and didn’t think of the pitfall it carried for him._ Still—I said to myself—‘what was the motive?’ The answer soon came—or rather part of the answer—we got news of ‘The Peacock’s Eye’—the great blue emerald. I heard of the mysterious Indian who had come miles to see you, Sir Matthew, but who nevertheless failed to turn up. He called on Sheila—it was _safe_ doing that—she couldn’t detect his lack of knowledge of Hindustani—you could. _He left you alone._ He was _counterfeit_. I only wanted one link now—how had the criminal met Miss Delaney? I got it. The ‘Bank Frauds’ scandal gave it to me. Now listen—I will at this point reconstruct the entire case. In the February of last year, Chief-Inspector Bannister visited Westhampton in connection with the ‘Mutual Bank’ Frauds and was actually the officer who arrested Sir Felix Warburton. For confirmation of that see the ‘Westhampton and Chellingborough Independent.’ He accompanied the Chief Constable, Major Desmond Carruthers, to the Hunt Ball. Carruthers kept his identity a secret.” Lady Fullgarney leaned across excitedly. “We saw them together—I remember him well—we couldn’t place him—could we, Matthew?”