Many investigators have attempted solve the riddle of the Thieves Guild. Despite repeated proofs that no viable Thieves Guild exists, the rumors persist. Whenever historians search for evidence of this shadowy organization, nothing is found. Witnesses know nothing. Safe houses are empty. Fences turn out to be simple businessmen. The problem with determining the non-existence of the Thieves Guild is quite logical. It is not possible to prove a negative. I cannot prove definitively that the Thieves Guild does not exist, only that historians have been unable to document one.