"Why, Holmes, it is a child's drawing," I cried.

"Oh, that's your idea!"

"What else should it be?"

"That is what Mr. Hilton Cubitt, of Riding Thorpe Manor, Norfolk, is very anxious to know. This little conundrum came by the first post, and he was to follow by the next train. There's a ring at the bell, Watson. I should not be very much surprised if this were he."

A heavy step was heard upon the stairs, and an instant later there entered a tall, ruddy, clean-shaven gentleman, whose clear eyes and florid cheeks told of a life led far from the fogs of Baker Street. He seemed to bring a whiff of his strong, fresh, bracing, east-coast air with him as he entered. Having shaken hands with each of us, he was about to sit down when his eye rested upon the paper with the curious markings, which I had just examined and left upon the table.

"Well, Mr. Holmes, what do you make of these?" he cried. "They told me that you were fond of queer mysteries, and I don't think you can find a queerer one than that. I sent the paper on ahead so that you might have time to study it before I came."