Rebus

A riddle or pun on a man's name, expressed in sculpture or painting, thus: a bolt or arrow, and a tun, for Bolton; death's head, and a ton, for Morton.
 Rebuses

are a class of Enigma generally formed by the first, sometimes the first and last, letters of words, or of transpositions of letters, or additions to words. Dr. Johnson, however, represents Rebus to be a word represented by a picture. And putting the Doctor's definition and our own explanation together, the reader may glean a good conception of the nature of the Rebus of which the following is an example:
The father of the Grecian Jove;
A little boy who's blind;
The foremost land in all the world;
The mother of mankind;
A poet whose love-sonnets are
Still very much admired;—
The initial  letters will declare
A blessing to the tired.
Answer—S aturn; L ove; E ngland; E ve; P lutarch. The initials form sleep.

Glass First Brought to England A.D. 668.