47 
necessary to a right understanding of their relative 
positions. At this point, as elsewhere, w r e noted, how¬ 
ever, what appeared to he a gradual change in the 
character of the strata : well marked sedimentary rocks 
of lower silurian age, becoming more and more schistose 
and gneissose, until finally the rock became granitic. 
A rough section across the river from west to east was 
made hurriedly. 
- The height of the tertiaries above the 
river at this point we found by barometric 
measurement to be 104 T feet. 
From Tambo to Shady Creek our route 
Was through a country occupied entirely 
by older silurian rocks, in places more 
or less altered, and with numerous veins 
of quartz. The country is exactly similar 
to that in which very productive quartz 
reefs have been found, and we are of 
opinion that there is here a very large 
area well worthy the attention of the 
prospector. The rapid rate at which we 
travelled prevented us from making 
careful observations, but those amongst 
us acquainted with auriferous tracts con¬ 
curred in the views we have expressed. 
The prospecting of such a district could 
not be undertaken by poor men, as the 
cost of transporting materials and stores 
would be considerable. It might be ad¬ 
vantageous to cut tracks in various direc¬ 
tions, so as to connect the sources of the 
Nicholson and the Wentworth with Noe- 
but we are not in a position, from 
yang ; 
