Phản xạ bởi bề mặt đầu tiên và một phần truyền vào trong khoang. Một khi trong khoang, làn sóng những kinh nghiệm một chuỗi dài vô tận của sự phản ánh một phần và các sự kiện truyền trên bề mặt mỗi. | Geoffrey of Monmouth Chapter 10. Aurelius is advised by Merlin to remove the Gianfs Dance from the mountain Killaraus. For this purpose he summoned together several carpenters and masons and commanded them to employ the utmost of their art in contriving some new structure for a lasting monument to those great men. But they in diffidence of their own skill refusing to undertake it Tremounus archbishop of the City of Legions went to the king and said ÒIf any one living is able to execute your commands Merlin the prophet of Vortigern is the man. In my opinion there is not in all your kingdom a person of a brighter genius either in predicting future events or in mechanical contrivances. Order him to come to you and exercise his skill in the work which you design. Whereupon Aurelius after he had asked a great many questions concerning him despatched several messengers into the country to find him out and bring him to him. After passing through several provinces they found him in the country of the Gewisseans at the fountain of Galabes which he frequently resorted to. As soon as they had delivered their message to him they conducted him to the king who received him with joy and being curious to hear some of his wonderful speeches commanded him to prophesy. Merlin made answer Mysteries of this kind are not to be revealed but when there is the greatest necessity for it. If I should pretend to utter them for ostentation or diversion the spirit that instructs me would be silent and would leave me when I should have occasion for When he had made the same refusal to all the rest present the king would not urge him any longer about his predictions but spoke to him concerning the monument which he designed. If you are desirous said Merlin to honour the burying-place of these men with an everlasting monument send for the Gianfs Dance which is in Killaraus a mountain in Ireland. For there is a structure of stones there which none of this age could raise without a profound .
