22 Tricks That Can Make Anyone A Keyboard Ninja - Using the mouse to perform repetitive tasks is not productive. The best way to boost your efficiency levels when browsing the internet is by using keyboard shortcuts.
1450 - 1500 A.D British Found Medieval Period Bronze Pilgrim Badge.IHS monogram
The 'ankh hieroglyph (life) rising between two "horns" at the quarries of Gebel el Silsilah. Image from this site . See also a photo here
PHILIPPE BERNARDI. Bâtir au Moyen Âge, CNRS Éditions, 2011, 336 p.