In the mid-1970s, Holland's journalism for Hibernia led to pressure from official republicans, then in the midst of a split with the Irish Republican Socialist Party, according to historians Brian Hanley and Scott Millar:
- Most of Hibernia's reports from Belfast were penned by Jack Holland, who had family and social contacts with the Officials, and a concrete reason to dislike them: His cousin Paul Tinnelly had been shot dead by the OIRA the previous year. Holland was informed by a leading Official that 'his career as a journalist in Dublin would be quickly brought to an end' if he continued to write critical reports.
- Biography, jackholland.net, memorial website.
- Henry McDonald, A writer's writer, Observer 23 May 2004.
- Echo's Jack Holland dead at 56, Irish Echo, 19 May 2004.
- Brian Hanley and Scott Millar, The Lost Revolution: The Story of the Official IRA and the Workers' Party, Penguin Ireland, 2009, p.307.