HYDEOGEAPHY. 



461 



covered in many localities far beneath the level of the sea. Off Domburg, a 

 village on Walcheren, the waves now cover a Roman temple, whence M. de Laveleye 

 concludes that the land there has subsided to the extent of about 30 feet. Another 

 ruin lies off Katwyk, about 1,000 yards from the shore. Antiquaries have 

 identified it with the tower which Caligula raised in memory of his pretended 

 victory over the Britons, and hence called it Arx Britannica, or Jluis te Britten. In 



Fig. 256. — The Coast-line of the Netheklands before the Country was Peopled. 

 According- to Staring. Scale 1 2,500,000. 



Seas and Likes. 



Bottom Lands. 

 ^— ^— 10 Miles. 



the sixteenth century the walls of this building were still 10 feet high, but every 

 trace of it has now disappeared. Fishermen pretend that farther out at sea there 

 are similar ruins— the so-called Toren van Calla— surrounded by fossil trees, 

 whose wood is as black as ebony. 



Another class of facts show that the subsidence is apparently only local. 

 M. Staring draws attention to old sea-beaches, now far itilaud, but on the same 



