The readiness with which habitations are procured in Ireland, and the facility of obtaining food for a family by means of the potato, are considered to be one cause of the rapid increase of population which is shown to have taken place towards the end of the 18th century.[27] Marriage was, and indeed still is, more early and more universal in Ireland than in England. An unmarried farmer or cottar is there rarely seen, and even the house-servants, men as well as women, are commonly married. Yet notwithstanding the rapid increase of population, there was a continual emigration from the ports of Derry and Belfast, several ships being regularly engaged in this passenger trade as it was called, conveying emigrants to the American colonies. These emigrants were however chiefly from the northern counties, partly farmers partly weavers. When the linen trade, the great staple of Ireland flourished, the passenger trade was low, and when the former was low the latter flourished. The emigrants are said to have been chiefly protestants, the Roman catholics at that time rarely quitting the country. ----- [27] See table at pages 11 and 12 ante. ----- The towns were said to have very much increased during the last twenty years. “It may in truth be said that Ireland has been newly built over within that period, and in a manner far superior to what was the case before.” Towns are the markets for the general produce of the country, which they help to enrich, and at the same time also to improve. The rise of rents is a natural consequence of the increase of towns; and on an average throughout Ireland, the rents are said to have doubled in the last twenty-five years. The entire rental of Ireland at that time is set down at 5,293,312_l._, but Arthur Young considered it to be not less than six millions. The cost of living was on the whole found to be nearly one-half less than in England. All the articles of use and consumption were cheaper in Ireland, and the taxes trifling in comparison. There was no land-tax, no poor’s-rate, no window-tax, no candle or soap tax, only half a wheel tax, no servants’ tax; and a variety of other things heavily burthened in England, were free or not so heavily burthened in Ireland. The expenses of a family in Dublin and in London, are considered to be in the proportion of five to eight; but the Irish do however, it is added, nevertheless contrive to spend their incomes. CHAPTER II.