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Looks like I'm going to pop off before they can execute me. I'll give you that "treasure", I just don't want the coppers to have it. I hid it in my room so go have a look. This is the key. Make sure you live a good long time. Well, bye then, 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 punishment, he fell mysteriously ill of a fever for less than ten months. 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 was found dead very early in the morning and the jailer heard Petenshy scream.
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, but he was killed by asphyxiation instead. This led people to believe that Selden's spirit now haunts the flat and kills residents by strangling them, it became known as "The Condemned Criminal's Curse". The investigation surrounding that incident and Garrideb's rejection caused Petenshy to still be unable to get the treasure. Ross' death led people to believe Selden some sort of curse on that flat. 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 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.