He disengaged the frame from the two nails on which it hung, and, turning it round, glanced at the back; which he then presented for my inspection. A label on the backing paper bore the words, “ J. Budge, Frame-maker and Gilder, 16, Gt. Anne Street, W.C. ”

“Well?” I said, when I had read the label without gathering from it anything fresh.

“The label, you observe, is the right way up as it hangs on the wall.”

“So it is,” I rejoined hastily, a little annoyed that I had not been quicker to observe so obvious a fact. “I see your point. You mean that the frame-maker hung the thing upside down and Jeffrey never noticed the mistake?”