After dropping Mary off at her home and meeting Miss Forrester, noting the relationship is rather warm and discordant to the more sordid matters occurring at the time. What’s on then heads off to pick up Toby from an associate of Sherlock, Mr. Sherman, who is happy to lend Toby. Watson returns to Pondicherry. 

Sherlock is re-examining the footprints on the roof, identifying them is rather peculiar due to the separation of the digits. When realising Watson and Toby, Sherlock requests that he let the dog free downstairs. Watson then observes Sherlock discover what he believes to be the point of entry for the intruders: a drainpipe leading down to a barrel. 

He then shows Watson a box of similar thorns to those found embedded within Bartholomew. Paragraph the next means in this investigation involve the use of Toby. Allowing Toby to smell the creosote, Sherlock and Watson follow the hound around London in search of a man with one leg. 

On the journey, Sherlock explains to Watson his theories and his relative conclusion. Sherlock believes the one-legged man to be Jonathan Small. He explains that Jonathan must’ve been a convict under the captain and the Major and that he must be seeking revenge for showing them the location of the treasure and being robbed of his share.

 Sherlock then concludes that the letter which rattled Sholto so must’ve been from Jonathan Small, informing the deceased about his freedom and his pursuit of what is his. 

He confirms his belief that the man with one leg is Jonathan by reminding Watson about the Major’s peculiar fear of men with wooden legs, and the fact that he shot a white man with a wooden leg confirms to him that Jonathan Small, one of the names upon the list and the only one belonging to a European man, must be this particular individual.

Sherlock then continues, saying that, when Jonathan arrived in England, he must have found Sholto’s residence and, hearing of the Major’s impending demise, snuck towards his window but was quickly forced to flee by Thaddeus and Bartholomew. After that, Sherlock continues, Jonathan must have remained in the vicinity, keeping a close watch upon the search for the treasure itself. 

Sherlock then supposes that Jonathan did not want Bartholomew to die and that it was the work of his accomplice instead, noting that his method of murder will savage-like. He reckons he has a good idea on the identity of this accomplice and that he will reveal all soon enough. 

Morning starts to break and Holmes and Watson are still trudging behind toby. The hound eventually leads them to a dead end, a store of creosote. This Phalia, however, is not seen in a bad light by Sherlock and Watson. Indeed, they seem to draw amusement out of it.