The claim of the king of Denmark to jurisdiction over the Danish Sound and the Two Belts, which entitled him to levy tolls upon vessels passing through, was based on prescription and fortified by treaties as early as the one with the Hanse towns in 1368. Against these tolls, as an unjust burden upon commerce, the United States protested in 1848, at the same time maintaining that Denmark had not the right of exclusive jurisdiction. The European states in 1855 paid a lump sum in capitalization of the sound dues. The United States, refusing to recognize the right of Denmark to levy tolls, paid $393,011 in 1857 in consideration of Denmark's agreement to keep up lighthouses, etc.
The navigation of the Bosphorus and Dardanelles has been a subject of discussion and treaty since 1774, when Russia compelled Turkey to open these straits to the passage of merchant vessels. War vessels were excluded till 1856 when, by convention attached to the Treaty of Paris, such vessels were admitted for special purposes of service to the embassies at Constantinople and protection of improvements on the Danube waterway. By the Treaty of 1871 the Sultan may admit other war vessels, if necessary for carrying out terms of the Treaty of Paris. The United States has never acknowledged that the Sultan had the right to exclude its war vessels, though always asking permission of the Sultan to pass the Dardanelles.
As a generally accepted principle the law may be stated as follows: straits connecting free seas are open to the navigation of all states, subject of course to reasonable jurisdiction of the territorial power.
(_d_) =Canals= connecting large bodies of water have been regarded as in most respects subject to jurisdiction similar to that of straits. Yet as these canals are constructed at a cost, they must also be given exemptions from certain restrictions which properly apply to natural channels.
The position of the Suez Canal as an international waterway gives some indication of existing practice.
It is to be noted, (1) that the canal is an artificial waterway; (2) that M. de Lesseps, a foreigner, in 1854, under authorization of the Viceroy, undertook its construction as a business venture; (3) that it is wholly within the territory of Egypt.
