Presented here are six deeds that cast light on landholding and legal matters in the earldom of Thomond during the first three decades of the seventeenth century. The documents were transcribed in a form as faithful to the original texts as possible. The deeds are archived in the Inchiquin Collection at the National Library of Ireland and in the Thomond papers at Petworth House in West Sussex. At one point, they all formed part of the collection of legal documents in the hands of the O’Briens of Thomond. People and places mentioned are located within the modern boundaries of Co. Clare. Individuals alluded to, almost without exception, were members of landholding lineages — great and small — that characterized Gaelic society. The early-seventeenth century was a period of great change in the Gaelic lordships as anglicization and colonization proceeded apace across Ireland. anglicization, along with expropriation of lands, irrevocably transformed Gaelic civilization. An important agent of change was English government and legal institutions which began to replace traditional allegiances and the systems of redistributive exchange that underpinned Gaelic society during this period.