Honestly, I don’t know where early cartographers got the gumption to put quill to parchment. I’m constantly tweaking the map for the country in my books. For example, caves play a large part in the second book, and that raises all sorts of geological and geographical questions:
- Have I set the caves at too high an altitude for the average temperature needed inside?
- Is a karst landscape even possible in this part of Europe?
- Will anybody get as worked up about the possible inaccuracy of saltpetre mines in this region?
I sit down with great determination only to have ink dry repeatedly on my nib whilst I dither. (Don’t even get me started on trebuchets and the concomitant questions related to physics.)
Without a doubt, medieval cartographers were made of sterner stuff than yours truly. I mean, one has to be made of stern stuff to be able to commit oneself to a creating a map of the world that is 5’2” x 4’4”. Those are the measurements of the magnificent, thirteenth-century Hereford Mappa Mundi (Fig. 1). The Hereford MM’s grand scale reflects the grandeur of the scale of the places and events depicted. Whatever the Hereford’s makers were made of, I want to be reconstituted with that.
A first glance at the circular shape of the map might mislead the viewer into thinking that its makers laid out the geography in question geographically, A second glance simultaneously corrects that illusion and confounds the reader.
The confusion arises in part because, little as it might seem, mappæ mundi like the Hereford are in many ways variations of the T-O maps from the last post (e.g. Fig 2). While the Hereford MM proceeds through multiple layers of geography, those layers are arranged in the same overall scheme as a simple T-O: various layers of Asia are supported by various layers op Europe on the left and Africa on the right.
If the simple T-O maps sought to orient the reader to the world at large with respect to important biblical history, mappæ mundi like the Hereford take that objective to the next level. The image of Christ in Majesty at the top of the Hereford MM makes explicit what the eastern orientation of T-O maps imply: that all the world and its unfolding history is moving toward one, great end under Christ. Think of it as teleological cartography. So, when the mapmakers included their little city of Hereford alongside important sites from Constantinople to Compostela this signified to medieval Herefordian that she or he was every bit a part of that same glorious, messy, and holy world history as folks from the Garden of Eden and the Exodus (which also make an appearance on the map).
In keeping with the role of mappæ mundi to evocatively map history as well as geography, the Hereford MM includes figures from mythology (e.g. Jason of the golden fleece) and history (Alexander the Great) alike. Marvelous beasts and monstrous races are scattered across the whole, indicating the wonders to be found throughout the wide world. The view can see a charming elephant, or cross-eyes monoceros (unicorn) or even a rather doggy-looking camel (Figs. 3-5).
Delightful as the various beasts are, I have to confess that I chiefly delight in the Hereford’s monsters. The map contains many of the same wonders treated in “popular” Latin and Old English texts, such as Alexander’s Letter to Aristotle, the Liber Monstrorum De Diversis Generibus (A book of monsters of various kinds), and the Wonders of the East. The Old English translation of Wonders found in the Beowulf manuscript contains a description of the mythical Cynocephali or dog-headed men.
Eac swylce þær beoð cende Healfhundingas ða syndon hatene Conopoenas. Hi habbað horses manan 7 eoferes tucxas 7 hunda heafda 7 heora oruð byð swylce fires lig. Þas land beoð neah ðam burgum þe beoð eallum woruldwelum gefylled, þæt is on þa suð healfe Ægiptna landes.
“Also there are born there half-dogs who are called Conopenæ. They have horses’ manes and boar’s tusks and dogs’ heads and their breath is like a fiery flame. Those lands are near the cities which are filled with all the worldly wealth: that is, in the south of Egypt.” 
Wondering what dog-headed men look like? Wondering where to find cities filled with worldly treasure? Wonder no more (Fig. 6). Alright, these “men” aren’t breathing fire, and there are no tusks to be found, but there’s no debating the dogginess of those heads.
Yes, yes, the Hereford has them nearer Norway than Egypt but then, Norway seems to have gotten itself into the wrong place on the map anyway. It’s all a bit of a muddle, but it’s a charming muddle.
Among the other unique people making appearances both on the Hereford and in the Wonders of the East are the Blemmyes (Fig. 7).
If Wonders of the East is to be trusted, these Blemmyes (unnamed in the text) are apparently perfectly square as well as headless:
Đonne is oðer ealand suð fram Brixonte on þam beoð men akende butan heafdum, þa habbaþ on heora breostum eagan 7 muð. Hi syndan eahta fota lange 7 eahta fota brade.
“Then there is another island, south of the Brixontes, on which there are born men without heads who have eyes and mouth in their chest. They are eight feet tall and eight feet wide.” 
Given that description, one rather expects something approximating a medieval SpongeBob SquarePants, but the makers of the Hereford spared us that image. (There are times when departing from the text really is a good thing.)
To a modern mind with preconceptions of either “Dark Age” ignorance or suspicions of religious homogeneity, I suppose, the juxtaposition of the mythical and monstrous beside the known or sacred might seem a bit jarring. It might even seem to confirm ignorance. For my part, the fact that such juxtapositions were not odd to medievals is one of the reasons I am so fond of the cultural productions from this time. If a little marvel creeps in from the margins, it’s not the end of the world because the world is still being figured out and everything finds its place.
For a far less frivolous treatment of the Hereford, its contents, and sources, go to Cartographic Images, http://cartographic-images.net/Cartographic_Images/226_The_Hereford_Mappamundi.html
 The Wonders of the East, in Pride and Prodigies: Studies in the Monsters of the Beowulf-Manuscript, ed. & trans. Andy Orchard. University of Toronto Press: Toronto, 1995, pp. 188-189.
 ibid., 192-193.