340 
BULLETIN OF THE NATURAL HISTORY SOCIETY. 
doubt it will be found continuing the line of the deadwaters 
across to the Little Southwest. Finally the river enters the val- 
ley of the Little Southwest, becomes abruptly more gentle in its 
character, and joins that river in a huge deadwater. 
It is of interest to note now the relations of the waters of this 
basin with others adjacent. On the northeast runs the North 
Pole Branch, whose head swings around to approach Dunn Lake 
on the plateau northeast of that lake, where their relations are 
still to be worked out. On the northwest come the sources of 
the Serpentine (Tobique), and in one place, at the head of Pat- 
chel Brook, these two systems are separated only by a slight rise 
of ground a few yards across (Note 63). On the west the Little 
Southwest itself runs parallel with the Walkemik. I was not 
able to follow the Little Southwest to its source, as I desired, 
but one branch heads in a notch on the plateau which can be 
clearly seen from the eastern end of Gover Lake, while, as Mr. 
Braithwaite tells me, the main stream swings to the westward 
and heads in two little lakes near the County line. The intersec- 
tion of timber lines and, the Portage Lake portage road with this 
river shows that its general course must be about as sketched on 
the map, though its course is still wholly unsurveyed. Obviously 
it is another of the parallel valleys of the primitive northwest- 
southeast series. 
In general, therefore, the physiographic history of the Walke- 
mik basin seems to be plain. It is a composite of two or three 
ancient northwest-southeast valleys which have been thrown 
together partly by ancient cross erosion and partly by glacial 
changes. It still remains a question how the Gover Lake basin 
here became so extensively eroded, even the abundance of streams 
hardly explaining its depth and extent, much less the extreme 
sharpness of the transition from it to the plateau. It is perhaps 
homologous in age and origin with the great Silurian plateau 
north of the Highlands. Further study may show that softer 
rocks occurred here, even though no traces of them were noted 
by us. 
The geology of the Walkemik basin, not having been studied 
at all heretofore, naturally excited our interest. But the entire 
