Highland Clearances). Croft sizes were set low to encourage the tenantry to participate in the industry (e.g. fishing, kelp ) the landlord wished to develop. A contemporary writer thought that a crofter would have to do work away from his holding for 200 days a year if his family were to avoid destitution. The various industries the crofting townships were supposed to support mostly prospered in the first quarter of the 19th century (drawing workers over and above the originally intended population of townships) but declined or collapsed over its second quarter. The crofting areas were correspondingly impoverished, but able to sustain themselves by a much greater reliance on potatoes (it was reckoned that one acre growing potatoes could support as many people as four acres growing oats). Between 1801 and 1841 the population in the crofting area increased by over half, whereas in the eastern and southern Highlands the increase in the same period was under 10 percent. Consequently, immediately pre-blight, whilst mainland Argyll had over of arable land per inhabitant, there was only of arable land per head in Skye and Wester Ross: in the crofting area, as in Ireland, the population had grown to levels which only a successful potato harvest could support. Famine and destitution Famine (1846–1847) In the Scottish Highlands, in 1846, there was widespread failure of potato crops as a result of potato blight. Crops failed in about three-quarters of the crofting region, putting a population of about 200,000 at risk; the following winter was especially cold and snowy and the death rate rose significantly. The Free Church of Scotland, strong in the affected areas, was prompt in raising the alarm and in organising relief, being the only body actively doing so in late 1846 and early 1847; relief was given regardless of denomination. Additionally, the Free Church organised transport for over 3,000 men from the famine-struck regions to work on the Lowland railways. This both removed people who needed to be fed from the area and provided money for their families to buy food. The British government took early notice of the crop failure. They were approached for assistance by landowners at the end of the summer of 1846, but any direct subsidies to the landlords were ruled out, as this would have relieved them of their responsibilities to their tenants. Sir Charles Trevelyan, the Assistant Secretary to the Treasury (effectively the senior