Between seven and eight million men and women left Ireland over the course of the nineteenth century. 1 For a country whose population has never been more than eight and a half million, that is a mind-boggling statistic, and one that might easily obscure individual emigrant lives. Historians have therefore tended to tackle Irish emigration in two disparate but complementary ways: some from the top down, with sophisticated statistical analysis, others from the bottom up, with recourse to the authentic voices of emigrants themselves. They have succeeded in breaking down that intimidating number by establishing broad patterns of who departed and when, where from and where to, and the gender and class balances amongst them. They have documented and contextualised the experiences of individual migrants as gleaned from thousands of surviving letters and memoirs. 2 Consequently we know a great deal about 'the Irish diaspora' and its often profound impact on the countries to which it spread. Yet the great blind spot of migration history is the effect a significant national diaspora has on the sending society. 3 After all, the country most affected by nineteenth-century Irish emigration was not the United States, where the largest proportion of emigrants went, nor Australia, which had a higher ratio of immigrants from Ireland among its population than from any other country, but Ireland itself, from where all of them ultimately came. This study proposes to improve our understanding of the phenomenon of Irish emigration by concentrating on Ireland rather than its diaspora, and within those parameters to look at a significant and hitherto overlooked aspect of the two-way relationship between the sending society and the outflow. Specifically, it seeks to ascertain and compare how the Irish