Professor Ferguson's unique vision of the Earth as a concave field, with a round convex area in the middle. At each corner of the square stand angels, a visualisation of the opening sentence of Revelations 7: four angels standing at the four corners of the earth, holding back the four winds. The map bears the subtitle "four hundred passages in the Bible that condemn the Globe Theory, or the Flying Earth, and none sustain it; this map is the Bible map of the world". (Image source: Library of Congress)