Prolific western producer, director and writer Robert N. Bradbury was in films from 1918. Even in the silent period, Bradbury was none too selective about his assignments, fluctuating from major-studio programmers to the fly-by-night quickies produced by Anthony J. Xydias and other entrepreneurs. In the early 1930s, Bradbury directed many of the now-famous Lone Star "B" westerns (Riders of Destiny, Blue Steel etc.) starring John Wayne. Robert North Bradbury was the father of cowboy star Bob Steele, who made his first appearances under his dad's direction in Pathe's Adventures of Bill and Bob semi-travelogues of the 1920s; perhaps significantly, many of the Bob Steele vehicles of the 1930s scripted by Bradbury concerned the hero's search for the man who murdered his father.