is often called the first historical novel. It launched a highly successful career that probably more than any other helped define and popularise Scottish cultural identity. In the late 19th century, a number of Scottish-born authors achieved international reputations, such as Robert Louis Stevenson, Arthur Conan Doyle, J. M. Barrie and George MacDonald. Scotland also played a major part in the development of art and architecture. The Glasgow School, which developed in the late 19th century, and flourished in the early 20th century, produced a distinctive blend of influences including the Celtic Revival the Arts and Crafts movement, and Japonism, which found favour throughout the modern art world of continental Europe and helped define the Art Nouveau style. Proponents included architect and artist Charles Rennie Mackintosh. This period saw a process of rehabilitation for Highland culture. In the 1820s, as part of the Romantic revival, tartan and the kilt were adopted by members of the social elite, not just in Scotland, but across Europe, prompted by the popularity of Macpherson's Ossian cycle and then Walter Scott's Waverley novels. The Highlands remained poor and the only part of mainland Britain with a recurrent famine. A small range of products were exported from the region, which had negligible industrial production and a continued population growth that tested the subsistence agriculture. These problems, and the desire to improve agriculture and profits were the driving forces of the ongoing Highland Clearances, in which many of the population of the Highlands suffered eviction as lands were enclosed, principally so that they could be used for sheep farming. The first phase of the clearances followed patterns of agricultural change throughout Britain. The second phase was driven by overpopulation, the Highland Potato Famine and the collapse of industries that had relied on the wartime economy of the Napoleonic Wars. The population of Scotland grew steadily in the 19th century, from 1,608,000 in the census of 1801 to 2,889,000 in 1851 and 4,472,000 in 1901. Even with the development of industry, there were not enough good jobs. As a result, during the period 1841–1931, about 2 million Scots migrated to North America and Australia, and another 750,000 Scots relocated to England. After prolonged years of struggle in the Kirk, the Evangelicals gained control of the General Assembly in 1834 and passed the Veto Act, which allowed congregations to reject unwanted "intrusive" presentations to livings by patrons. The following