One day in early spring he had so far relaxed as to go for a walk with me in the Park, where the first faint shoots of green were breaking out upon the elms, and the sticky spearheads of the chestnuts were just beginning to burst into their fivefold leaves. For two hours we rambled about together, in silence for the most part, as befits two men who know each other intimately. It was nearly five before we were back in Baker Street once more.

“Beg pardon, sir,” said our pageboy, as he opened the door. “There’s been a gentleman here asking for you, sir.”

Holmes glanced reproachfully at me. “So much for afternoon walks!” said he. “Has this gentleman gone, then?”

“Yes, sir.”

“Didn’t you ask him in?”

“Yes, sir; he came in.”

“How long did he wait?”