As a reporter, Clark covered (among many other stories) the Great Haileybury Fire of 1922, the Lindbergh Kidnap Trial in 1935, and the coronation of King George VI and the royal couple's 1939 tour of Canada. However, perhaps Clark's most celebrated piece of reportage the surrounded his coverage of Moose River Mine Disaster of 1936. After having arrived in Nova Scotia to cover the story, Clark continued to stay with the rescue crew after many other reporters had left, as they had given up hope that the trapped miners were still alive. Clark was therefore on hand when the first faint taps of the trapped miners were heard, and was able to report the scoop first-hand.