GRILSE 35 
curve, as if the particular influences which brought 
grilse in shore to the netted area of the coast also 
affected the salmon in the same way. A separate 
chart of curves was given for the sweep-net fisheries. 
in the mouth of the river Dee. In this the first 
grilse are shown as caught on April 18, or three days 
later than on the coast, while the date of the greatest 
catch is June 27, or four days later than the 
maximum in the coast nets to the north of the river 
mouth. The fixed nets, which are situated to the 
south of the river mouth, do not share in the marked 
influx of grilse. From these considerations it would 
appear that the grilse approach the shore from the 
north of the Dee, that they travel together in large 
numbers, and, working along the coast in a southerly 
direction towards the mouth of the river Dee, very 
slowly and no doubt in an off and on manner (else 
the first nets encountered would absorb the great 
bulk of the run) enter fresh water three to four days 
after having struck the coast ‘from the bosom of" 
the deep,” as a fisherman picturesquely put it to me 
on one occasion. Everything we know about the 
salmon in this stage seems therefore to indicate that 
after leaving the river as a smolt, which it does com- 
pletely and with some rapidity, the young fish does 
not as a rule again visit the shore, much less the 
river, until a year has passed, when in company 
with its fellows it swims into shallow water and 
when some re-enter the rivers of their nativity. 
In the Baltic around the island of Bornholm a. 
line-fishery exists for salmon. The bait used is 
herring, and the lines are set so as not to go to the 
