The medieval trade-routes between western Europe and eastern and southern Asia fall into two groups: the northern, which passed mainly by land, and the southern, which passed mainly by sea. The former communicated with central Asia, China, and India through the Black Sea and Asia Minor, the latter through Syria and Egypt. Each group had branches which entered Asia near Aleppo and diverged in the direction of Tabriz and Bagdad. On all routes there were what in America are compendiously termed ‘long hauls’ and ‘short hauls’; that is to say, wares which travelled most of the way, as Western silver and coral and Eastern silk and spice, and wares which travelled only part of the way, as sugar, cotton, and Arabian gums. It was possible, also, for merchants who dealt in goods of the former class to travel the whole road or to go only part of it and sell or exchange their commodities, which would be carried on by other hands. For most goods the southern routes, especially that by the Red Sea, were cheaper, because they ran mostly by sea;[1] but this consideration was less important in the case of the costlier spices, especially as they were liable to suffer damage in the holds of ships. It was not so much, however, the question of expense as political and religious conditions which determined what routes would be preferred. If merchants are hindered by one route, said Marino Sanuto the Elder, they find another, like water, and they never cease seeking a way which will bring them more profit.[2]