A. V. Jennings — The Landicasser and Landquart. 261 



of the lake, the origin of the Landwasser. Five miles below the 

 lake, but only at a level of thirty metres below its surface, the 

 Landwasser is joined by the Sertig, which flows also northward and 

 westward from its source among the snows of the Ducan. Thus 

 reinforced the Landwasser flows on past Frauenkirch and Glaris, 

 and through the Ziige gorge, finally joining the Albula, and so in 

 time also reaching the Ehine. 





-2Z. Present dra.//iapt a/ /Ae J?Ayas dxstr/ct. 



Sca./c /■2SO,0a£f 



Professor Heim considers that this distribution of the two rivers 

 and their tributaries does not represent the original drainage con- 

 ditions of the area. He is of opinion that the valley of the 

 Landwasser once extended northward above the present site of 

 Klosters, and that its river was continuous with that rising at the 

 head of the Schlappinathal.^ The western side of this valley 

 consisted of a rock-wall continuous with the masses now remaining 

 on either side of the Pratigau — the Madrishorn and Calanda on the 

 north and the Casanna and Cotschna on the south. This wall, on 

 the hypothesis in question, was cut through by the head waters of 



" Mectaniamus der Gebirgsbildung," p. 321. 



