116 The American Geologist. Auf,'ust, 18% 
higlits above 1,000 i'eet reached. Just opposite Maekey the 
valley of the river Du Moine o])ens towards the north just as 
does the Maganasippi at Deux Kivieres. At Bissett there is 
no valley opening exactly op])osite. A small one opens from 
the north a few miles below, but at neither of these places 
did the relation of the sand area to the opposite valley seem 
so i)lain as at Deux Rivieres. 
Eastward from Deux Rivieres the railway passes by a back 
valley and rises to 827 feet at Aylen. This valley appears to 
have been swept bare of nearly ever^^thing but bowlders. 
Much the same appearance was presented by the region east 
of Maekey past Moor and Bass lakes where the railway again 
rises to about 700 feet. It is not improbable that these valle^'^s 
were swept out by the outrushing waters of lake Algonfjuin 
when the ice front still blocked the course of the Ottawa which 
lies a few miles farther north. Perhaps the sand deposits at 
Bissett and Maekey were modified by the same cause. Per- 
haps they might otherwise have been typical kame areas like 
that at Deux Rivieres. 
The new observations near North Bay and those at Trout 
creek and Callender (C. P. R.) accord closely with what had 
been done before in that region. There can be no doubt of 
the recent presence of wide waters at high levels over lake 
Nipissing and the headwaters of the Mattawa river. At the 
live places seen in the Ottawa valley, however, no clear and 
certain evidence of high level submergence was found, except, 
perhaps, the thin silts and clays overlying the drift south of 
Mattawa up to about 800 feet. This limit for such a deposit 
would seem to imply a contemporary water surface at a still 
higher level, and it is more than probable that for a compara- 
tively brief period such an eastward extension actually 
existed. 
As related elsewhere, the results attained during the pre- 
ceding month on the north coast of lake Superior, showing 
that there were no straits northward to Hudson bay, seemed 
to leave little support for the marine hypothesis of the high- 
est beach in the northern part of the lake basins unless that 
hypothesis could be shown to be strongly reinforced by evi- 
dences from the region to the east of North\Bay. The obser- 
vations in the Ottawa valle}^ are too meagerjto be taken as 
