200 BRITISH FRESH-WATER FISHES 
Izaak Walton, albeit he knew little or nothing at first hand 
about the salmon, had been told what modern research has con- 
firmed, namely, that “his growth is very sudden ; it is said 
that, after he is got into the sea, he becomes, from a samlet not 
so big as a gudgeon, to be a salmon in as short a time as a 
gosling becomes a goose. Much of this has been observed by 
tying a riband, or some known tape or thread, in the tail of 
some young salmon which have been taken in weirs as they 
have swimmed towards the salt water; and then by taking a 
part of them again, with the known mark, at the said place, at 
Rate of their return from the sea, which is usually about six 
aes months after.” But it is only of late years that 
Salmonoids. trustworthy data have been accumulated whereon any 
sound estimate could be based as to the rate of growth 
in salmon and their kin after their first descent to the 
ocean. ‘These data have been collected and tabulated by Mr. 
W. L. Calderwood, and published in the Report of the Fishery 
Board for Scotland, Part IL., for 1901, forming a most valuable 
source of information for all persons interested in the question. 
Space can be found here only for a brief reference to this paper. 
The following are a few out of a large number of fish captured 
as kelts and recaptured as clean fish, recorded—trst, by Mr. 
Young, of Invershin, in the years 1841-2; 2nd, by the late 
Duke of Atholl, in the Tay, 1854-9; 3rd, by the Tweed 
Commissioners, 1854-70; 4th, by Mr. Walter Archer, 
Inspector of Salmon-Fisheries in Scotland, under the system 
initiated by him in 1896, and continued by his successor in 
office, Mr. Calderwood, from 1898 to the present time ; 5th, 
by a gentleman on the Hampshire Avon, who has communi- 
cated his observations to the Fze/d newspaper. 
Mr. Calderwood reports that, at the close of 1901, out 
of 2,976 fish recently marked in ten Scottish rivers, 190 
had been retaken and the particulars thereof recorded. 
NE Cn eg 
