The story of the sudden change from cotton to linen is an instructive one. Cotton appears to have forced itself to the front because cotton spinning could be carried on by machinery whilst the linen weavers were still dependent on the spinning wheel for their yarn. It was Andrew Mulholland, the owner of the York Street cotton mill, who first took note of the fact that while the supply of hand-made linen yarn was quite insufficient to justify the manufacture of linen on a large scale in Belfast, quantities of flax were shipped from Belfast to Manchester to be spun there and reimported as yarn. Mulholland determined to try if he could not spin yarn as well as the Manchester people, and accordingly in 1830, "the first bundle of linen yarn produced by machinery in Belfast was thrown off from the York Street mill." That, and not legislation nor any system of State bounties or State favour, was the beginning of the Belfast linen industry in which the York Street mill still maintains its deserved pre-eminence. When the critical moment arrived, as it does in the case of all industries, when manufacturers must adapt themselves to new methods or succumb, the Belfast leaders of industry rose to the occasion and secured for themselves the chief share in the linen trade. In the rest of Ireland, it is true, the manufacture dwindled and disappeared, but whatever may have been the cause of that disappearance, it was certainly not the Act of Union.
The agrarian problem has caused more trouble in Ireland than any other, and statesmen have long recognised that on its definite settlement depends the hope of permanent peace and progress over the greater part of the country. It is not, and never has been, the real cause of rural depopulation, for, as we have seen, the increase of the rural population was most rapid at the time when agrarian conditions were at their very worst, whilst on the other hand emigration continues almost unchecked in counties where the question has been virtually settled. And in 1881 the late Mr. J.H. Tuke discovered by an analysis of the census returns that the only "townlands" in which the rural population was actually increasing were those scattered along the western seaboard of Ireland, where the tenure and the conditions of existence seemed most hopeless. But, as the Devon Commission announced in 1845, it was an essentially defective system of land tenure that lay at the root of the perennial discontent with which Ireland was troubled, and things went from bad to worse until the Party organised for the defence of the Union and the social betterment of Ireland took up the task of settling the question by the transfer on fair terms of the ownership of the soil from the large landowners to the tenants.