Among the many gigantic though somewhat shadowy personalities of the viking age, two stand forth with undisputed pre-eminence: Rolf the founder of Normandy and Canute the Emperor of the North. Both were sea-kings; each represents the culmination and the close of a great migratory movement, - Rolf of the earlier viking period, Canute of its later and more restricted phase. The early history of each is uncertain and obscure; both come suddenly forth upon the stage of action, eager and trained for conquest. Rolf is said to have been the outlawed son of a Norse earl; Canute was the younger son of a Danish king: neither had the promise of sovereignty or of landed inheritance. Still, in the end, both became rulers of important states - the pirate became a constructive statesman... But more specifically Canute inherited the extensive plans, the restless dreams, the imperialistic policy, and the ancient feuds of the Knytling dynasty. Canute’s career is the history of Danish imperialism carried to a swift realisation. What had proved a task too great for his forbears Canute in a great measure achieved. In England and in Norway, in Sleswick and in Wendland, he carried the plans of his dynasty to a successful issue. It will, therefore, be necessary to sketch with some care the background of Canute’s career and to trace to their origins the threads of policy that Canute took up and wove into the web of empire. Some of these can be followed back at least three generations to the reign of Gorm in the beginning of the tenth century...