November 22, 1895: Colonel Valentine Walter confessed to stealing the Submarine plans. [BRUC]
‘I can assure you,’ said Holmes, ‘that every essential is already known. We know that you were pressed for money, that you took an impress of the keys which your brother held, and that you entered into a correspondence with Oberstein, who answered your letters through the advertisement columns of the Daily Telegraph. We are aware that you went down to the office in the fog of Monday night, but that you were seen and followed by young Cadogan West, who had probably some previous reason to suspect you. He saw your theft, but could not give the alarm, as it was just possible that you were taking the papers to your brother in London. Leaving all his private concerns, like the good citizen that he was, he followed you closely in the fog, and kept at your heels until you reached this very house. There he intervened, and then it was, Colonel Walter, that to treason you added the more terrible crime of murder.’
‘I did not! I did not! Before God I swear that I did not!’ cried our wretched prisoner.
‘Tell us, then, how Cadogan West met his end before you laid him upon the roof of a railway carriage.’
‘I will. I swear to you that I will. I did the rest. I confess it. It was just as you say. A Stock Exchange debt had to be paid. I needed the money badly. Oberstein offered me five thousand. It was to save myself from ruin. But as to murder, I am as innocent as you.’
Source: A Day by Day Chronology of Mr. Sherlock Holmes according to Zeisler and Christ, compiled by William S Dorn, BSI, DWNP.