[2] He belonged to a leading Anglo-Irish family, the Cusacks, who came to Ireland soon after the Norman invasion in the late twelfth century and settled mainly in County Meath.
[3] Walter was summoned by King Edward I for military service in the First War of Scottish Independence in 1303 and 1307, and probably on two or three later occasions.
[4] He was politically a close ally of the Justiciar, Roger Mortimer, 1st Earl of March, in the years 1316-8, and was steward of his Irish estates.
[7] About a year after the final defeat of the invasion, John petitioned the Council for compensation for his own and his father's losses in the King's service.
[1] Through his second marriage he acquired Knocktopher Castle in County Kilkenny, which Nigel and Amicia had purchased from Sir Walter de la Haye, the former Justiciar of Ireland, in 1309.