Ever been curious how experts decide how one piece of writing's real while another's a forgery? In relatively quick fashion, this text will guide you thru. A lot of it's boring to the non-"document detective," like telling the difference between a cinnamon shaker and a sand shaker, but it all fits together. And some of it's downright fascinating.
I especially liked the sections on the development of the alphabet. "...At first the Romans dropped Z entirely, then found they could not get along without it. When they allowed Z to return to the alphabet, it had lost its place in the regular order [it was sixth in the Greek alphabet] and had to get to the end of the line. We have kept it there ever since."
Also interesting, pegging era to the style in which letters are constructed. And why they happen to be formed that way!