Holmes continues his explanation at dawn. Once the purpose of the advertisement is known, the next question is what the criminals hoped to gain from Wilson’s absence. A small pawnbroker’s shop seems to contain nothing worth so much money and effort. Holmes describes how he moved from the contents of the house to what might lie beyond it.
"Had there been women in the house, I should have suspected a mere vulgar intrigue.「家に女性がいたなら、ただの下世話な色恋沙汰を疑ったところだ。
That, however, was out of the question.しかし、それはありえなかった。
The man's business was a small one, and there was nothing in his house which could account for such elaborate preparations, and such an expenditure as they were at.あの男の商売はささやかなもので、家の中には、あれほど手の込んだ準備や、あれほどの出費に見合うような物は何もなかった。
It must, then, be something out of the house.とすれば、ねらいは家の外の何かに違いない。
What could it be?それは何なのか?
I thought of the assistant's fondness for photography, and his trick of vanishing into the cellar.私は、助手が写真に夢中なことと、地下室に姿を消す癖があることを思い出した。
The cellar!地下室だ!
There was the end of this tangled clue.このもつれた糸の端は、そこにあったのだ。
Then I made inquiries as to this mysterious assistant and found that I had to deal with one of the coolest and most daring criminals in London.そこで、この謎めいた助手について調べてみると、相手はロンドンでも指折りの冷静で大胆な犯罪者だと分かった。
He was doing something in the cellar—something which took many hours a day for months on end.その男が地下室で何かをしている――それも、何か月もぶっ通しで、毎日何時間もかかる何かを。
What could it be, once more?もう一度問うが、それは何なのか?
I could think of nothing save that he was running a tunnel to some other building.どこか別の建物までトンネルを掘り進めている、としか考えられなかった。