Heavy metals are here treated as light metals and, in general, are not further considered. The heaviness of naturally occurring metals such as gold, copper, and iron may have been noticed in prehistory and, in light of their malleability, led to the first attempts to craft metal ornaments, tools, and weapons. All metals discovered from then until 1809 had relatively high densities; their heaviness was regarded as a singularly distinguishing criterion. From 1809 onwards, light metals such as sodium, potassium, and strontium were isolated. Their low densities challenged conventional wisdom and it was proposed to refer to them as "metalloids" (meaning "resembling
The Unbeheaded King Xylar and Othomae. As usual, the political constraints under which the protagonist labor are at least as important as the fantastic element. The decidedly unromantic, even hardscrabble circumstances under which he must achieve his goals leaven the fantasy with a strong sense of reality, and highlight de Camp's unusual reversal of the genre's stereotypical rags to riches theme. The Unbeheaded King The Unbeheaded King is a fantasy novel by American writer L. Sprague de Camp, the fourth book of his Novarian series and the third in the "Reluctant King" trilogy featuring King Jorian of Xylar. It was first published as