by German bombers, as were smaller towns mostly located in the central belt of the country. Perhaps the most significant air-raid in Scotland was the Clydebank Blitz of March 1941, which intended to destroy naval shipbuilding in the area. 528 people were killed and 4,000 homes totally destroyed. Perhaps Scotland's most unusual wartime episode occurred in 1941 when Rudolf Hess flew to Renfrewshire, possibly intending to broker a peace deal through the Duke of Hamilton. Before his departure from Germany, Hess had given his adjutant, Karlheinz Pintsch, a letter addressed to Hitler that detailed his intentions to open peace negotiations with the British. Pintsch delivered the letter to Hitler at the Berghof around noon on 11 May. Albert Speer later said Hitler described Hess's departure as one of the worst personal blows of his life, as he considered it a personal betrayal. Hitler worried that his allies, Italy and Japan, would perceive Hess's act as an attempt by Hitler to secretly open peace negotiations with the British. As in World War I, Scapa Flow in Orkney served as an important Royal Navy base. Attacks on Scapa Flow and Rosyth gave RAF fighters their first successes downing bombers in the Firth of Forth and East Lothian. The shipyards and heavy engineering factories in Glasgow and Clydeside played a key part in the war effort, and suffered attacks from the Luftwaffe, enduring great destruction and loss of life. As transatlantic voyages involved negotiating north-west Britain, Scotland played a key part in the battle of the North Atlantic. Shetland's relative proximity to occupied Norway resulted in the Shetland bus by which fishing boats helped Norwegians flee the Nazis, and expeditions across the North Sea to assist resistance. Scottish industry came out of the depression slump by a dramatic expansion of its industrial activity, absorbing unemployed men and many women as well. The shipyards were the centre of more activity, but many smaller industries produced the machinery needed by the British bombers, tanks and warships. Agriculture prospered, as did all sectors except for coal mining, which was operating mines near exhaustion. Real wages, adjusted for inflation, rose 25% and unemployment temporarily vanished. Increased income, and the more equal distribution of food, obtained through a tight rationing system, dramatically improved the health and nutrition. After 1945, Scotland's economic situation worsened due to overseas competition, inefficient industry, and industrial disputes. Only in recent decades has the