Access to primary sources is one of the cornerstones of historical research. Until the arrival of the Internet and digitization, many primary sources were available only in large research libraries and archives, and students and scholars had to travel to the institutions holding these sources in order to do research. This situation has changed since the arrival of the Internet and the efforts of research libraries, government agencies, and collaborative initiatives to digitize these sources and mount them on the Web. This article discusses the potential impact of digitization on scholarly research and uses one source--"Foreign Relations of the United States"--as an example of a primary source for first-person accounts of world events from the nineteenth century to the present.