“It was very essential for Stapleton to get some article of Sir Henry’s attire so that, in case he was driven to use the dog, he might always have the means of setting him upon his track. With characteristic promptness and audacity he set about this at once, and we cannot doubt that the boots or chamber-maid of the hotel was well bribed to help him in his design. By chance, however, the first boot which was procured for him was a new one and, therefore, useless for his purpose. He then had it returned and obtained another—a most instructive incident, since it proved conclusively to my mind that we were dealing with a real hound, as no other supposition could explain this anxiety to obtain an old boot and this indifference to a new one. The more outré and grotesque an incident is the more carefully it deserves to be examined, and the very point which appears to complicate a case is, when duly considered and scientifically handled, the one which is most likely to elucidate it.
“Then we had the visit from our friends next morning, shadowed always by Stapleton in the cab. From his knowledge of our rooms and of my appearance, as well as from his general conduct, I am inclined to think that Stapleton’s career of crime has been by no means limited to this single Baskerville affair. It is suggestive that during the last three years there have been four considerable burglaries in the west country, for none of which was any criminal ever arrested. The last of these, at Folkestone Court, in May, was remarkable for the cold-blooded pistolling of the page, who surprised the masked and solitary burglar. I cannot doubt that Stapleton recruited his waning resources in this fashion, and that for years he has been a desperate and dangerous man.