The Surveyor in Foure Bookes

This first Book consists of two parts. The former treats only of the first matters, grounds, and elements of geometry, such as the distinction of lines, angles, triangles, and other figures, with their definitions, showing what they are. The second part contains diverse geometrical theorems, tending chiefly and most fitly to the subject and matter prosecuted in the subsequent books, whereby the ingenious practitioner may readily conceive and apprehend the ground and reason of the precepts, rules, and problems delivered therein.

A point is that which is the least of all materials, having neither part nor quantity.

Euclid, Book 1, Def. 1. Between unity in arithmetic and this point in geometry, there is a near resemblance: but that is more simple and pure; this is material and (although the least that can be imagined) requires position and place, as this point A.