GRILSE 55 
water, but presumably the fish’s sojourn in the sea 
had been comparatively short. A more striking 
instance is to be found in a Brora marked grilse— 
the river Brora enters the sea on the east coast of 
Sutherland—which was recaptured in the Pentland 
Firth, exactly 100 miles away by the coast line, 
after an interval of only three and a half months 
(109 days). There is some reason to suppose that 
this fish had forsaken the river Brora, since a 
Helmsdale fish marked within a few miles of the 
other has also been taken in the same locality, but 
instead of in a bag-net near the mouth of the river 
Halladale, as was the case with the Brora fish, it 
was taken by rod up the river Halladale. We 
must not, however, overlook the fact that such 
wanderers are in all probability exceptions to the 
general rule, but, as has been said, there seems to 
be a possibility that fish leaving small rivers, or 
rivers only frequented by small fish, are more likely to 
wander elsewhere than fish belonging to large rivers 
such as the Tay. 
The information as to hitherto unexplained points 
in the life of the salmon, obtained by the sys- 
tematic marking of recent years, must now, how- 
ever, be followed out in a separate chapter. 
