The massacre terrified Protestant settlers and was used to support the view that the rebellion was a Catholic conspiracy to massacre all Protestants in Ireland, though in truth such massacres were mostly confined to Ulster. In 1642, a commission of inquiry was held into the killings of settlers. Protestant bishop Henry Jones led the inquiry and read out some of the evidence to the English parliament in March 1642, although most of his speech was based on hearsay. The atrocity featured prominently in English Parliamentarian atrocity propaganda in the 1640s, most famously in John Temple's "The Irish Rebellion" (1646). Temple used the massacres at Portadown and elsewhere to lobby for the military re-conquest of Ireland and the segregation of Irish Catholics from British Protestants. Accounts of the massacre strengthened the resolve of many Parliamentarians to re-conquer Ireland, which they did in 1649–52. Massacres were committed by Oliver Cromwell's army during this conquest, and it resulted in the confiscation of most Catholic-owned land and mass deportations. Temple's work was published at least ten times between 1646 and 1812. The graphic massacres depicted therein were used to lobby against granting more rights to Catholics.