Historians of eighteenth-century Ireland agree in stating that catholics succeeded in amassing considerable wealth in trade, in spite of, or even because of, the popery laws, but little effort has been made to examine this question in detail.

What percentage of the principal merchants and traders of Ireland belonged to the catholic faith, or what percentage of the trade of Ireland was in their hands during the century? It is doubtful whether these questions will ever be answered completely. Contemporary travel books, and even contemporary local histories such as those of Charles Smith, scarcely mention trade, and contribute not at all to solving our particular problem. Local histories of more modern date concentrate on political rather than on economic history; and although it is to be hoped that local historians and genealogists will fill in some of the gaps, from family papers, from local newspapers and other available sources, the general historian investigating the problem has at present no regional or local studies to assist him in his researches. He must therefore try to piece together such scraps of information as are available and endeavour to arrive at some general conclusions.

Connacht in the eighteenth century was regarded as the most remote and the most catholic part of Ireland. These two qualities gave the region a very individual character, and the few travellers who ventured to cross the Shannon had the sensation of entering another world. This did not apply to two of the five counties—Leitrim and Sligo, which had been allotted tothe soldiers of the parliamentary army in the Cromwellian settlement and for this reason were not typical of the province. The essential Connacht lay beyond the Shannon in the counties of Galway, Mayo and Roscommon, the greater part of which had been reserved for catholic landowners in the Cromwellian settlement. The result of this arrangement was to leave the catholic gentry in a much stronger position in Connacht than in the rest of Ireland. This position remained largely unshaken by the Jacobite war, as the treaty of Limerick, the terms of the surrender of Galway, and their own solidarity protected most of the Connacht landholders from confiscation at the end of the war.

When the eighteenth century began, several hundred catholic landholders were in occupation of a substantial part of Galway and Mayo and, to a lesser degree, of Roscommon. This situation was a constant source of anxiety to the authorities, who from time to time were alarmed about the prospect of a French landing in the west supported by catholic landlords and catholic peasants. It was said that catholics in Connacht outnumbered protestants by fifty to one and that in some counties there were so few protestant freeholders to serve on juries that the region could scarcely be held to acknowledge the authority of the government.