Doubly important, therefore, is it to learn from the writing of Apollonia that she, as "Burgtmaagd" (chief of the virgins), about 540 years before Christ, made a journey up the Rhine to Switzerland, and there became acquainted with the Lake Dwellers (Marsaten). She describes their dwellings built upon piles--the people themselves--their manners and customs. She relates that they lived by fishing and hunting, and that they prepared the skins of the animals with the bark of the birch-tree in order to sell the furs to the Rhine boatmen, who brought them into commerce. This account of the pile dwellings in the Swiss lakes can only have been written in the time when these dwellings still existed and were lived in. In the second part of the writing, Konerêd oera Linda relates that Adel, the son of Friso (±250 years before Christ), visited the pile dwellings in Switzerland with his wife Ifkja. Later than this account there is no mention by any writer whatever of the pile dwellings, and the subject has remained for twenty centuries utterly unknown until 1853, when an extraordinary low state of the water led to the discovery of these dwellings. Therefore no one could have invented this account in the intervening period. Although a great portion of the first part of the work--the book of Adela--belongs to the mythological period before the Trojan war, there is a striking difference between it and the Greek myths. The Myths have no dates, much less any chronology, nor any internal coherence of successive events. The untrammelled fancy develops itself in every poem separately and independently. The mythological stories contradict each other on every point. "Les Mythes ne se tiennent pas," is the only key to the Greek Mythology. Here, on the contrary, we meet with a regular succession of dates starting from a fixed period--the destruction of Atland, 2193 before Christ. The accounts are natural and simple, often naïve, never contradict each other, and are always consistent with each other in time and place. As, for instance, the arrival and sojourn of Ulysses with the Burgtmaagd Kalip at Walhallagara (Walcheren), which is the most mythical portion of all, is here said to be 1005 years after the disappearance of Atland, which coincides with 1188 years before Christ, and thus agrees very nearly with the time at which the Greeks say the Trojan war took place. The story of Ulysses was not brought here for the first time by the Romans. Tacitus found it already in Lower Germany (see "Germania," cap. 3), and says that at Asciburgium there was an altar on which the names of Ulysses and his father Laërtes were inscribed.