Unlike most accounts of the Scottish families who re-settled in Ulster beginning in 1612-1620 and continuing through most of that century, Linehan's essays focus less upon the animosities between the Scotch-Irish Presbyterians and Irish Catholics and more on their cultural commonalities. The author expands upon this theme in discussions of medieval Scottish and Irish history, which reveal that many of the Scots who migrated to Ireland in the 17th century were in fact descendants of Irish families who relocated to Argyle in 503. Linehan also discusses the founding of a number of Scotch-Irish communities, such as Antrim, New Hampshire. Genealogists will appreciate the list of the original Scottish settlers of the Ulster Plantation, 1612-1620, and the detailed name and subject index containing over 1,000 references.