The great problems of the twentieth century will have immediate relation to the discoveries of America, of Africa, and of Australia.

In all these problems, Englishmen will have most to say and to do, and the history of geographical discovery is, therefore, of immediate and immense interest to Englishmen.
[_Authorities:_ Cooley, _History of Maritime and Inland Discoveries_, 3 vols., 1831; Vivien de Saint Martin, _Histoire de la Geographie_, 1873.].