tag:digital.library.illinois.edu,2005:/items/ed363970-1a05-0134-1d6d-0050569601ca-3Bank vaults on main floor2023-11-30T16:47:57Ztag:digital.library.illinois.edu,2005:Item/393372016-08-11T15:00:08Z2023-11-30T16:47:57ZBank vaults on main floorFrom text: "At the rear of the banking floor are ten immense vaults in which the money, valuables, and books of the bank are placed at the close of each day's business. If ever anything built by human hands was made impregnable to assault from without, this business vault of the Chicago National Bank certainly was. It stands three stories in height and is clear of the walls on every side, in order that watchmen may completely encircle it in their rounds at night. Attack from the outside by way of the floor or ceiling is equally out of the question, the surrounding brick walls being four feet thick in the basement, three feet thick on the banking floor, and two feet thick above that... If ever criminals should conceive a scheme for attempting to reach the interior of these vaults, they would find their keenest ingenuity baffled."University of Illinois at Urbana-Champaign Library