 Complete the following phrase:  The Edinburgh Vaults or South Bridge Vaults are a series of chambers formed in the nineteen arches of the South Bridge in Edinburgh, Scotland, was part of the South Bridge Act 1785 and was completed in 1788. For around 30 years, the vaults were used to house taverns, workshops for cobblers and other tradesmen, as well as storage space for said merchants. In later years, the vaults were a hotspot for the homeless and for criminal activity such as illegal gambling taverns, illegal whisky distillery and, according to rumour, bodysnatchers stored corpses there overnight. There is however no proof that the serial killers 