Volume 18, covering part of the final session of the First Congress, shows Jefferson as Secretary of State continuing his effective collaboration with James Madison in seeking commercial reciprocity with Great Britain by threatening--and almost achieving--a retaliatory navigation bill. During these few weeks Jefferson produced a remarkable series of official reports on Gouverneur Morris' abortive mission to England, on the first case of British impressment of American seamen to be noticed officially, on the interrelated problems of Mediterranean trade and the American captives in Algiers, and on the French protest against the tonnage acts. All of these state papers reflected the consistency of Jefferson's aim to bolster the independence of the United States, to promote national unity, and even, as his report on the Algerine captives indicates, to lay the foundations for American maritime power.