Notes[1] The warder took the place of the present day castle in chess. The castle was not introduced until the sixteenth century.
[2] Possibly an epileptic or a man under the influence of the drug obtained by eating the scarlet spotted mushroom, Amanita.
[3] See Time Magazine 14 July 1967. The Danish archaeologist, Thorhild Ramskou, has a theory that the stone with which the sun could always be found by the Vikings was cordierite, a transparent crystal which turns from yellow to blue whenever its natural molecular alignment was held at right angles to the plane of polarized light from the sun. Compare also the twilight compasses used by airline pilots today in high latitudes using the sunlight polarized by the atmosphere even when it is behind clouds.
[4] North America.
Thank you f
