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Holmes distinguishes the naturally dried black ink of the name from the blotted gray address. He infers that the writer paused to obtain an unfamiliar address before completing the envelope. Turning to the enclosure, he learns that it contains St. Clair's signet ring and that Mrs. St. Clair recognizes the hurried handwriting as one form of her husband's script.
"The name, you see, is in perfectly black ink, which has dried itself. The rest is of the greyish colour, which shows that blotting-paper has been used. If it had been written straight off, and then blotted, none would be of a deep black shade. This man has written the name, and there has then been a pause before he wrote the address, which can only mean that he was not familiar with it. It is, of course, a trifle, but there is nothing so important as trifles. Let us now see the letter. Ha! there has been an enclosure here!"
「お名前の部分は真っ黒なインクで、自然に乾いています。残りは灰色がかっていて、吸い取り紙を使ったことが分かります。続けて全部書いてから吸い取ったなら、どこにも深い黒は残らなかったでしょう。この人は名前を書き、それから一度間を置いて住所を書いた。それは住所をよく知らなかったということにほかなりません。もちろん些細なことですが、些細なことほど大切なものはありません。さて、手紙を見ましょう。おや、ここには同封物がありましたね」
"Yes, there was a ring. His signet-ring."
「ええ、指輪が。主人の印章指輪です」
"And you are sure that this is your husband's hand?"
「そして、これがご主人の筆跡なのは確かですか」
"One of his hands."
「主人の筆跡の一つです」
"One?"
「一つですって」
"His hand when he wrote hurriedly. It is very unlike his usual writing, and yet I know it well."
「急いで書くときの字です。普段の字とはずいぶん違いますが、私にはよく分かるのです」