Despite its wide success and imitators, "The Great Train Robbery" did not lead to a significant increase in Western-themed films; instead, the genre continued essentially as it had before, in a scattered mix of short actualities and longer stories. These, especially the actualities, gradually decreased in vogue, and it was not until 1908 that American Western films began to proliferate in earnest. One of the leading contributors to this later Western film boom was Porter's colleague Anderson, now billed as Broncho Billy Anderson.