from The travels of Sir John Mandeville : the version of the Cotton manuscript in modern spelling (published London, 1900)
From a manuscript of c. 1410-1430
How the earth and the sea be of round form and shape, by proof of the star that is clept Antarctic, that is fixed in the south
In that land, ne in many other beyond that, no man may see the Star Transmontane, that is clept the Star of the Sea, that is unmovable and that is toward the north, that we clepe the Lode-star. But men see another star, the contrary to him, that is toward the south, that is clept Antartic. And right as the ship-men take their advice here and govern them by the Lode-star, right so do ship-men beyond those parts by the star of the south, the which star appeareth not to us. And this star that is toward the north, that we clepe the Lode-star, ne appeareth not to them. For which cause men may well perceive, that the land and the sea be of round shape and form ; for the part of the firmament sheweth in one country that sheweth not in another country. And men may well prove by experience and subtle compassment of wit, that if a man found passages by ships that would go to search the world, men might go by ship all about the world and above and beneath.
And wit well, that, after that that I may perceive and comprehend, the lands of Prester John, Emperor of Ind, be under us. For in going from Scotland or from Eng- land toward Jerusalem men go upward always. For our land is in the low part of the earth toward the west, and the land of Prester John is in the low part of the earth toward the east. And [they] have there the day when we have the night ; and also, high to the contrary, they have the night when we have the day. For the earth and the sea be of round form and shape, as I have said before ; and that that men go upward to one coast, men go down- ward to another coast.
Also ye have heard me say that Jerusalem is in the midst of the world. And that may men prove, and shew there by a spear, that is pight into the earth, upon the hour of midday, when it is equinox, that sheweth no shadow on no side. And that it should be in the midst of the world, David witnesseth it in the Psalter, where he saith, Deus operatus est salutem in medio terrae. Then, they, that part from those parts of the west for to go toward Jerusalem, as many journeys as they go upward for to go thither, in as many journeys may they go from Jerusalem unto other confines of the superficiality of the earth beyond. And when men go beyond those journeys toward Ind and to the foreign isles, all is environing the roundness of the earth and of the sea under our countries on this half.
And therefore hath it befallen many times of one thing that I have heard counted when I was young, how a worthy man departed some-time from our countries for to go search the world. And so he passed Ind and the isles beyond Ind, where be more than 5000 isles. And so long he went by sea and land, and so environed the world by many seasons, that he found an isle where he heard speak his own language, calling on oxen in the plough, such words as men speak to beasts in his own country ; whereof he had great marvel, for he knew not how it might be. But I say, that he had gone so long by land and by sea, that he had environed all the earth ; that he was come again environing, that is to say, going about, unto his own marches, and if he would have passed further, till he had found his country and his own knowledge. But he turned again from thence, from whence he was come from. And so he lost much painful labour, as himself said a great while after that he was come home. For it befell after, that he went into Norway. And there tempest of the sea took him, and he arrived in an isle. And, when he was in that isle, he knew well that it was the isle, where he had heard speak his own language before and the calling of oxen at the plough ; and that was possible thing.
But how it seemeth to simple men unlearned, that men ne may not go under the earth, and also that men should fall toward the heaven from under. But that may not be, upon less than we may fall toward heaven from the earth where we be. For from what part of the earth that men dwell, either above or beneath, it seemeth always to them that dwell that they go more right than any other folk. And right as it seemeth to us that they be under us, right so it seemeth to them that we be under them. For if a man might fall from the earth unto the firmament, by greater reason the earth and the sea that be so great and so heavy should fall to the firmament : but that may not be, and therefore saith our Lord God, Non timeas me, qui suspendi terram ex nihilo ?
And albeit that it be possible thing that men may so environ all the world, natheles, of a thousand persons, one ne might not happen to return into his country. For, for the greatness of the earth and of the sea, men may go by a thousand and a thousand other ways, that no man could ready him perfectly toward the parts that he came from, but if it were by adventure and hap, or by the grace of God. For the earth is full large and full great, and holds in roundness and about environ, by above and by beneath, 20425 miles, after the opinion of old wise astronomers ; and their sayings I reprove nought. But, after my little wit, it seemeth me, saving their reverence, that it is more.
And for to have better understanding I say thus. Be there imagined a figure that hath a great compass. And, about the point of the great compass that is clept the centre, be made another little compass. Then after, be the great compass devised by lines in many parts, and that all the lines meet at the centre. So, that in as many parts as the great compass shall be departed, in as many shall be departed the little, that is about the centre, albeit that the spaces be less. Now then, be the great compass repre- sented for the firmament, and the little compass represented for the earth. Now then, the firmament is devised by astronomers in twelve signs, and every sign is devised in thirty degrees; that is, 360 degrees that the firmament hath above. Also, be the earth devised in as many parts as the firmament, and let every part answer to a degree of the firmament. And wit it well, that, after the authors of astronomy, 700 furlongs of earth answer to a degree of the firmament, and those be eighty-seven miles and four furlongs. Now be that here multiplied by 360 sithes, and then they be 31,500 miles every of eight furlongs, after miles of our country. So much hath the earth in roundness and of height environ, after mine opinion and mine understanding.
And ye shall understand, that after the opinion of old wise philosophers and astronomers, our country ne Ireland ne Wales ne Scotland ne Norway ne the other isles coasting to them ne be not in the superficiality counted above the earth, as it sheweth by all the books of astronomy. For the superficiality of the earth is parted in seven parts for the seven planets, and those parts be clept climates. And our parts be not of the seven climates, for they be descending toward the west towards the roundness of the world. And also these isles of Ind which be even against us be not reckoned in the climates. For they be against us that be in the low country. And the seven climates stretch them environing the world.