George Glasgow, The Minoans (1923)
“ Traces of commercial intercourse overseas can be found as far back as the Neolithic Age. Among the deposits of stone implements in Crete are great quantities of obsidian knives, and the only source of obsidian in the Ægean was the island of Melos. Obsidian is a kind of volcanic glass which flakes off into layers, giving a natural edge. Excavators, who are as childish as most people, have shaved, and have had near shaves, with obsidian knives.It is probable that the Minoan Empire had a navy as well as a merchant marine. ”
