“But very superficial,” said Holmes. “We come now, however, to a point which is of importance. You may not be aware that the deduction of a man’s age from his writing is one which has been brought to considerable accuracy by experts. In normal cases one can place a man in his true decade with tolerable confidence. I say normal cases, because ill-health and physical weakness reproduce the signs of old age, even when the invalid is a youth. In this case, looking at the bold, strong hand of the one, and the rather broken-backed appearance of the other, which still retains its legibility although the t ’s have begun to lose their crossing, we can say that the one was a young man and the other was advanced in years without being positively decrepit.”

“Excellent!” cried Mr. Acton again.