In the shadow of HSBC's global headquarters in London, there’s a nondescript business park that preserves the bank’s history. Thousands of ledgers, bank notes and photos sit in an air-conditioned vault. Here you can trace the roots of HSBC back over 235 years; dig for nuggets of silver; or read the boardroom minutes from key moments in HSBC’s life. Sara Kinsey and Rachael Spree from the archive team open up the Group's history vaults to pick out their favourite artifacts.