Add encyclopedia entry for helm of brilliance.

dat/data.base

@@ -2363,6 +2363,11 @@ hell hound*
 	dark form and savage face which broke upon us out of the wall
 	of fog.
 	  [ The Hound of the Baskervilles, by Sir Arthur Conan Doyle ]
+helm of brilliance
+	A helm he set on his head, high of steel; thereon was many gemstone,
+	all encompassed with gold; it was Uther’s, the noble king’s; it was
+	named Goswhit, each other unlike.
+		[ Layamon's Brut, translated by Sir Frederic Madden, K.H. ]
 hermes
 	Messenger and herald of the Olympians.  Being required to do
 	a great deal of travelling and speaking in public, he became