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So... I'm kickin' it before my damn execution... eh.... ? That "treasure"... is yours. Don't wanna be givin' it to the Yard... I hid it in my flat, so go tear through it. ...This is the key... ...Live long, friend. I'll be... going first. Petenshy...
Selden used to live in a flat owned by John Garrideb. In 1899, he had charges of eighteen counts of robbery and six suspected counts of murder, was sent to Manchester prison and put on death row. However, before Selden could actually be given his execution punishment, he fell mysteriously ill of a burning fever at the end of October. One single prisoner, William Petenshy, looked after Selden until his death. As a result of this loyalty, Selden decided to give his treasure, thousand pounds worth of jewels, to Petenshy, telling him he could find it in his old flat, and gave him the key with which to open the treasure. Selden passed away late that night before Petenshy could call for a physician. The jailer heard Petenshy very early the next morning and Selden's corpse was found.
William Petenshy was released from Manchester prison soon after, but Selden's flat was already owned by Duncan Ross. So Petenshy blew into the gas pipe on the flat just below, he was intending for Ross to just run away out of fear, but he was killed by asphyxiation instead. This led people to believe that Selden's spirit now haunts the flat and will kill its residents by strangling them, the newspapers called it "The Condemned Criminal's Curse". The investigation surrounding that incident and Garrideb's rejection of moving in caused Petenshy to still be unable to search for the treasure. Sōseki Natsume took up the flat after the investigation, William Petenshy then decided to do the same trick to him. But then he was poisoned by Duncan Ross' fiance, Viridian Green, and soon arrested for the accidental murder of Ross. Selden's thousand pound jeweled treasure located in the ceiling was later revealed to be the dog collar of Klimt van Zieks' dog, Balmung, which was received from the Baskerville family upon van Zieks' marriage. Selden snuck into the van Zieks manor several years ago and stole it.