"In 1937, the best trading year for Britain between the world wars, the volume of her visible exports amounted to only two-thirds of the 1913 figure. The British share of world trade in manufactures fell from nearly 24 per cent in 1921–5 to 18.6 per cent in 1936–8, whereas Germany's share actually rose from 17.4 per cent to 19.8 per cent, and Japan's from 3.4 per cent to 7 per cent. As a consequence of this slow defeat and retreat in world markets for manufactures Britain was compelled to look more and more to her invisible exports (banking, insurance and shipping services, plus the income from the vast overseas investments built up during the Victorian age) in order to pay for the imports essential to the nation's life and work. Even at the height of her nineteenth-century dominance as a manufacturing country Britain had relied on such invisible exports to keep her balance of payments in equilibrium – indeed to enable her to earn the surpluses to invest overseas. But the percentage of imports that had to be covered by invisible earnings rose from 19.2 per cent in 1870–4 to 44.4 per cent in 1935–9. Even so, Britain by these latter years was incurring an overall balance of payments deficit. Like some ageing industrialist who finds that the shrunken profits from the family firm are no longer enough to pay for his accustomed way of life, Britain had to resort to spending capital. In other words, in the run-up to the Second World War Britain was gradually selling off her foreign investments and using up her gold reserves."