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These four parts
that I am describing for you, which
are all located in
one quarter of the world's landmass,
ought to all be round in form. For reason
and nature show that the whole
world is round. So think of this quarter
as being round as well. So let us make
a completely round circle out of this
quarter and put it in the middle
of that line which designates east and west,
so as to properly align the parts,
as this figure in front of you shows.
And you can see it plainly.
Then, let each part be turned
towards its name [i.e. north, south, east, or west,]
of which each