... Young¹

English physican and physicist established the principle of interference of light and thus resurrected the century-old wave theory of light.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... (1790-1832)²

French historian and linguist who founded scientific Egyptology. Academically prodigious, he had already mastered six ancient Oriental languages by the age of 16. At 19, he was appointed professor of history at the lycé of Grenoble, where he was to remain for eight years. Deciphering hieroglyphics became his constant preoccupation

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... hieroglyphics³

The words ``hieroglyph" or ``hierogliphic" are derived from the Greek words grammata hiera or grammata hieroglyphika respectively.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... ``Horus-eye."⁴

See Ifrah, p 208.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... three⁵

The rule of three was the rule to determine the fourth and unknown quantity in the expression $\frac{a}{b}=\frac{c}{d}$ in which the other three are known

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... again⁶

excluding the Great Wall of China constructed in third century BCE

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.