WERBELINSEE.--According to Professor Virchow, this lake contains the remains of a most interesting pile-dwelling. (B. 165.) The lake is situated not far from Joachimsthal and Angermünde, and on its south side, near the village of Altenhof, piles were detected which, by a vague tradition, were supposed to mark the site of a bridge. Professor Virchow, however, by placing long wooden poles in the water where the submerged ancient piles were observed, demonstrated the existence of a vast area which even the sceptical boatmen admitted could only have been intended for the foundations of a village. PERSANZIGERSEE.--This lake, according to Kasiski (B. 125 and 362), is situated four and a half miles to the west of Neustettin, and formerly covered about 186 acres; but in 1863 it was lowered some 10 feet by the construction of a drainage canal, thereby reducing its area to less than as many roods. At the north end of the lake, and 170 yards from the shore, there appeared a small island, which was found to have been surrounded by a remarkable structure of piles and cross-beams. Sixty yards to the north of this island there was a flat prominence, called the "Werder," which was completely cut off from the mainland, partly by bogs and partly by an arm of the lake 55 yards wide. (See accompanying Sketch Map.) Stretching between the island and the point of the Werder the stumps of a double row of piles, doubtless the remains of a bridge, were detected. A similar bridge also extended from the Werder to the shore; and to the south of this were the remains of a third bridge, which appears to have never been finished, as it stopped suddenly short after reaching some 40 yards into the lake in the direction of the island. Another row of piles, commencing at the outer end of the bridge which connected the island with the Werder, extended circularly for a considerable distance in the bed of the lake, as if intended to protect the island. [Illustration: A Persanzig See B Plan of Pfahlbauten in Persanzig See]