probably artanor was conceived at this time as a great region of forest in the heart of which was tinwelint 's cavern , and only his immediate domain was protected by the power of the queen : hidden was his dwelling from the vision and knowledge of melko by the magics of gwendeling the fay , and she wove spells about the paths thereto that none but the eldar might tread them easily , and so was the king secured from all dangers save it be treachery alone .