THE MORISTON 173 



facto have to be regarded as Crown property. Subsequently, Mr. 

 Grant of Glenmoriston obtained a Crown charter, in fee, for the 

 fishings above the fall. As reported by the late Mr. Young, he was 

 already in possession of a barony title, fortified by prescription, to 

 the salmon fishings ex adverse his property below the fall. 



The new pass, on the right or south bank of the river, has been 

 carried upstream a considerable distance above the fall in order to 

 secure an easy gradient. The general arrangement of the pass is 

 shown in the plan here given. The surface of the pool at the head 

 of the pass is 24 feet above the surface of the pool below the fall. 

 The length of the pass, exclusive of modifications in the upper pool 

 for the purpose of directing the water-flow, is 240 feet. The breadth 

 is 10 feet, and the gradient is 1 in 21*7 throughout. The entire 

 excavation has been in solid rock, as may be seen by reference to 

 the photograph given, and the cutting towards the lower end of the 

 pass is fully 35 feet deep. The mouth or entrance to the pass is 

 carried, at the gradient already mentioned, into the fall pool, so that 

 fish do not require to leap into the pass, as was the case in their 

 attempts to enter the old Invermoriston Ladder, but may swim into 

 and up the pass. The mouth is not appreciably nearer the fall than 

 is the mouth of the old ladder on the opposite side, but a very con- 

 siderable volume of water can be brought down the pass to influence 

 the fall pool, and a ledge of rock above the mouth acts as a good guide. 

 The intake of the pass is provided with three substantial sluices 

 arranged originally to suit different levels of water, the middle sluice 

 being one foot higher in the sill than the sluice on one side, and one 

 foot lower than that on the other side. A short arch of rock exists 

 just below the sluices. For the purpose of acting as breaks or stops 

 to the force of descending water, stones 36 inches long are sunk into 

 the bed of the pass so as to project 20 to 24 inches. These stones 

 which may be noticed in the photograph, taken from inside the dry 

 pass looking down through the mouth to the river below are 

 14 inches broad and about 12 inches thick, and are placed in rows at 

 right angles to the sides of the pass, three stones in a row with 

 spaces of about 16 inches between each. From the sluices to the 

 first row of stones the distance was 20 feet, but for the rest of the 

 way down the pass rows of stones occur every 15 feet. 



After the pass was completed, some alterations had to be made at 

 the intake in order to overcome the too great rush of water which 

 occurred in certain conditions of the river. It was found that fish 

 could easily swim up the pass, but had difficulty in getting through 



