The circle spread from them is that part of Heaven under which the Sun revolves when it is in Aries and Libra.

Wherefore, it is to be known that if a stone could fall from this Pole of ours, it would fall there beyond into the sea precisely upon that surface of the sea, where, if a man could be, he would always have the Sun above the middle of his head; and I believe that from Rome to that place, going in a straight line to the North, the distance may be almost two thousand seven hundred miles, or a little more or less.

Imagining, then, in order to understand better what I say, that there is in that place a city, and that its name may be Maria, I say again that if from the other Pole, that is, the Southern, a stone could fall, that it would fall upon that part of the ocean which is precisely on this ball opposite to Maria; and I believe that from Rome to where this second stone would fall, going in a direct line to the South, the distance may be seven thousand five hundred miles, a little more or less.

And here let us imagine another city, which may have the name of Lucia; and the distance, from whatever part one draws the line, is ten thousand two hundred miles between the one and the other, that is, half the circumference of this ball, so that the citizens of Maria hold the soles of the feet opposite the soles of the feet of the citizens of Lucia.

Let us imagine also a circle upon this ball which is in every part equi-distant from Maria as from Lucia.