70 THE SALMON RIVERS OF SCOTLAND 



So far as I understand from other sources the marked variation 

 shown in this list may be accounted for by a varying amount of 

 fishing and by a varying kind of fisherman. 



The fishings in the Tay above the junction of the Tummel at 

 Logierait are, like the Dalguise fishings just referred to, chiefly pro- 

 ductive in the spring. The autumn fish which yield so much sport 

 in the lower waters do not ascend so far before the season finishes. 

 Some of the water between Logierait and Grandtully is even-flowing 

 and rather sluggish. Just above Grandtully Bridge a considerable 

 rapid occurs as the river descends amongst rocks below a partial 

 weir. Above this, beautiful streams and pools exist in Findynate, 

 Killiechassie, Grandtully, and Edradynate, and again further up at 

 Weem, where, however, the water does not yield very many salmon. 

 At Edradynate the system of croy-building has been carefully 

 developed by Mr. H. W. Johnston, so that in one large pool alone 

 represented in the photograph with Mr. Johnston in his Norwegian 

 boat there are eleven croys. It is well named the Croy Pool. As 

 the proper method of erecting those structures is as little known in 

 some localities as the benefit to be derived from them, and as I have 

 repeatedly referred to the probable benefit of erecting croys in other 

 rivers, I have given an extract from a valuable article on the subject 

 which appeared in Baily's Magazine for May 1908, in an appendix. 



The spring fish taken in this topmost stretch of the river between 

 Aberfeldy and Grandtully Bridge during recent years are : 



1904 .' - 80 



1905 - . 110 



1906 - - 195 



1907 - - 120 



1908 - - 140 



RIVER ISLA. 



The Isla tributary enters immediately below Meikleour on the left 

 bank, a short distance below the handsome new road bridge which 

 now crosses the Tay to Kinclaven, Murthly, and Stanley. The 

 mouth of the Isla is peculiarly sluggish, and since the Tay sweeps 

 round the bend below the bridge with a merry current, the water of 

 the Isla seems to produce little or no effect upon it, and the lead in 

 for fish is poor in consequence. Plans for improving the mouth of 

 the river have been suggested more than once, but so far nothing has 

 been done. For some miles the Isla is deep and sluggish and 

 infested by pike, though a finer character is found in the Ericht, 

 which flows into it from the north through Blairgowrie, where, at 

 the Keith, serious obstructions exist in the form of cascades, and 



