The series comprises personal and professional correspondence of Lubor J. Zink demonstrating his involvement and impact in political and foreign affairs journalism over four decades. Most of the letters reveal the reactions of readers of his columns, ranging from passionate agreement to bitter condemnation. Frequent correspondents included Ottawa politicians, public servants, colleagues at "Toronto Telegram" and other newspapers, and regular readers who often shared his anti-communist sentiments or hailed from an eastern European background. Early letters from the 1960s held congratulations on his newspaper awards, response to his critique of Prime Minister John Diefenbaker's defence and foreign policies, coverage of the Vietnam war, progress of freedom in Czechoslovakia in the late 1960s, situation in Rhodesia and South Africa, and the rise of Pierre Trudeau. Perhaps his most frequent correspondent in these years was his publisher John Bassett who, though supporting Zink's journalistic freedom, felt compelled to warn him at times about the extremity and repetitiveness of his attacks on prime ministers John Diefenbaker and later Pierre Trudeau. Other correspondents at the "Telegram" included editors and colleagues such as J. D. MacFarlane, Arnold Agnew, Shirley Sharzer, McKenzie Porter, Peter Dempson, and Jim Emmerson, among others. He also received letters from politicians like Walter Dinsdale, George Hees, Duff Roblin, Joseph Sullivan, and Robert N. Thompson.
Zink's correspondence from the "Toronto Sun" years shows reaction to his column's continuing war against Pierre Trudeau and his concern over Canada's lukewarm or lack of support for American foreign policy in the fight against communism. Readers for and against him continued to be the greatest source of his correspondence but there are also letters from politicians and figures on the Canadian right like National Citizens' Coalition president David Somerville and author David Frum. There are also letters from "Toronto Sun" publishers J. Douglas Creighton and Paul Godfrey, figures like the jesuit A. J. Macdougall and sculptor Sandra J. Shaw.