Background migration: the Irish (and other strangers) in mid-Victorian Hertfordshire

Relatively few Irish had settled in Hertfordshire by the time of the 1851 census. Those that did were older, more skilled, less residentially segregated, and more likely to be married to a local person than were the Irish-born in London and other large cities in Britain. The Irish-born in Hertfordshire were also less skilled and less intermarried than were county residents born in Scotland, Wales and Yorkshire. All of these migrant groups were very rare in rural areas of the county and very few of the migrants were involved in agriculture, despite the passage of large numbers of Irish harvesters through the county each year.