Setting aside the Ptolemy, which represents the knowledge of the world at its height in the pre-Christian civilisation, and the Edrisi which represents the Arabic followers of Ptolemy, whose influence upon early Christian geography was very marked, all the maps reproduced belong to the science of the Christian ages and countries. The two Mappe-mondes above referred to are both placed in the introductory chapter, and are treated only as the most important examples of the science which the Græco-Roman Empire bequeathed to Christendom, but which between the seventh and thirteenth centuries was chiefly worked upon by the Arabs. Among early Christian maps, that of St. Sever, possibly of the eighth century, the Anglo-Saxon map of the tenth century, the Turin Map of the eleventh, and the Spanish map of the twelfth (1109), represent very crude and simple types of sketches of the world, in which within a square or oblong surrounded by the ocean a few prominent features only, such as the main divisions of countries, are attempted. The Anglo-Saxon example, though greatly superior to the others given here, essentially belongs to this kind of work, where some little truth is preserved by a happy ignorance of the travellers' tales that came into fashion later, but where there is only the vaguest and most general knowledge of geographical facts.

On the other hand, in the next group, to which the Psalter map is allied, and in which the Hereford map is our best example, mythical learning—drawn from books like Pliny, Solinus, St. Isidore, and Martianus Capella, which collected stories of beasts and monsters, stones and men, divine, human, and natural marvels on the principle Credo quia impossible—has overpowered every other consideration, and a map of the world becomes a great picture-book of curious objects, in which the very central and primary interest of geography is lost. But by the side of and almost at the same time as these specimens of geographical mythology, geographical science had taken a new start in the coast charts or portolani of Balearic and Italian seamen, some specimens of which form our next set of maps.

Dulcert's portolano of 1339 and the Laurentian of 1351 are two of the best examples of this kind of work, which gave us our first really accurate map of any part of the globe, but which for some time was entirely confined to coast drawing, and was meant to supply the practical wants of captains, pilots, and seamen. The Catalan atlas of 1375-6 shows the portolano type extended to a real Mappa Mundi; the elaborate carefulness and sumptuousness of this example prepares us for the still higher work of Andrea Bianco and of Benincasa in the fifteenth century. As the Laurentian portolano of 1351 commemorates the voyage of 1341 and marks its discoveries in the Atlantic islands, so the Catalan map of 1375-6 commemorates the Catalan voyage of 1346, and gives the best and most up-to-date picture of the N.W. African coast as it was known before Prince Henry's discoveries.

Last of these groups of maps is that of examples from Henry's own age, such as the Fra Mauro map of 1459 or the maps of Andrea Bianco and Benincasa (e.g., 1436, 1448, 1468), among which the first-named is the only one we have been able to give here.

The Borgian map of 1450 is given as an extraordinary specimen of what could be done as late as 1450, not as an example of geographical progress; and the map of 1492, recording Portuguese discoveries down to the rounding of the Cape of Good Hope, is added to illustrate the advance of explorers in the years closely following Henry's death, as it was realised at the time.

The maps have in most cases been set from the modern standpoint, but, as will readily be seen by the position of the names, the normal mediæval setting was quite different, with the S. or E. at the top.

II. The illustrations aim at giving portraits or pictures of the chief persons and places connected with the life of Prince Henry. There are three of the Prince himself; one from the Paris MS. of Azurara, one from the gateway of the great convent church of Belem, one from the recumbent statue over his tomb at Batalha. Two others give: (1) The whole group of the royal tombs of Henry's house,—of his father, mother, and brothers in the aisle at Batalha, and (2) the recumbent statues of his father and mother, John and Philippa, in detail; the exterior and general effect of the same church—Portugal's Westminster, and the mausoleum of the Navigator's own family of Aviz—comes next, in a view of this greatest of Portuguese shrines.

Coimbra University, with which as rector or chancellor or patron Prince Henry was so closely connected, for which he once provided house room, and in which his benefactions earned him the title of "Protector of the studies of Portugal" is given to illustrate his life as a student and a man of science; the mother church of the order of Christ at Thomar may remind us of another side of his life—as a military monk, grand master of an order of religious chivalry which at least professed to bind its members to a single life, and which under his lead took an active part in the exploration and settlement of the African coasts and the Atlantic islands.

The portraits of Columbus, Da Gama, and Albuquerque, which conclude this set of illustrations, are given as portraits of three of Prince Henry's more or less conscious disciples and followers, of three men who did most to realise his schemes. The first of these, who owed to Portuguese advance towards the south the suggestion of corresponding success in the west, and who found America by the western route to India,—as Henry had planned nearly a century before to round Africa and reach Malabar by the eastern and southern way,—was the nearest of the Prince's successful imitators in time, the greatest in achievement; he was not a mere follower of the Portuguese initiative, for he struck out a new line or at least a neglected one, made the greatest of all geographical additions to human knowledge, and took the most daring plunge into the unknown that has ever been taken—but Columbus, beside his independent position and interest, was certainly on one side a disciple of Henry the Navigator, and drew much of his inspiration from the impulse that the Prince had started. Da Gama, the first who sailed direct from Lisbon to India round Africa, and Albuquerque, the maker, if not the founder, of the Portuguese empire in the East, were simply the realisers of the vast ambitions that take their start from the work and life of Prince Henry, and he has a right to claim them as two leading champions of his plans and policy. In many points Albuquerque, like Columbus, is more than a follower; but in the main outline of his achievement he follows upon the work of other men, and, among these men, of none so much as the Hero of Portugal and of modern discovery.

Lastly. I have to thank many friends generally for their constant kindness and readiness to assist in any way, and in particular several for the most generous and valuable help in certain parts.

Mr. T.A. Archer, besides the benefit of his suggestions throughout, has given special aid in Chapters I., III., V., and the Introductory Chapter, especially where anything is said of the connection of geographical progress with the Crusades.[7]

Mr. F. York Powell has revised Chapter II. on the Vikings, and Professor Margoliouth has done the same for the Introductory Chapter on Greek and Arabic geography; Mr. Coote has not only given me every help in the map room of the