11 Harrowhouse

11 Harrowhouse is a 1974 British heist comedy thriller film directed by Aram Avakian and starring Charles Grodin, Candice Bergen, James Mason, Trevor Howard, and John Gielgud in Panavision. It was adapted by Grodin based upon the novel by Gerald A. Browne, with the screenplay by Jeffrey Bloom. It was made at Pinewood Studios with extensive location shooting in London, Ragley Hall in Warwickshire and at Quainton Road railway station. The film's sets were designed by the art director Peter Mullins. The hand of Assistant Art Director John Siddall was used to paint the cockroaches. Plot In England, a small-time diamond merchant (Charles Grodin) is unexpectedly offered the chance to supervise the purchase and cutting of an extremely large diamond to be named after its wealthy owner (Trevor Howard). When the diamond is stolen from him, he is blackmailed into pulling off a major heist at "The System," located at 11 Harrowhouse Street, City of London with the help of his beautiful and wealthy girlfriend (Candice Bergen). The key figure in the theft, however, is the inside man, Watts (James Mason) who works in the vault at The System. Watts is dying of cancer and wants to leave his family financially secure. Although "The System" has an elaborate network of defences and alarms against intruders, the robbery is carried out at night by gaining access to the roof from an adjacent property and threading a hosepipe down a conduit into the vault, where Watts uses it to vacuum up thousands of rough diamonds out of their drawers. The thieves leave before the robbery is discovered, and when found in the vault in the morning, Watts claims to have eaten the gems. Before he can confess, Watts deliberately swallows poison and dies at 11 Harrowhouse Street. Most of the loot is buried in concrete, to prevent it flooding the market. Cast Charles Grodin as Howard R. Chesser Candice Bergen as Maren Shirell James Mason as Charles D. Watts Trevor Howard as Clyde Massey John Gielgud as Meecham, the head man at the System Helen Cherry as Lady Bolding Peter Vaughan as Coglin Cyril Shaps as Wildenstein Leon Greene as Toland Jack Watson as Miller Jack Watling as Fitzmaurice Clive Morton as Sir Harold Larry Cross as Whitman John Siddall as Hands used to paint the cockroaches