390 THE DRY-FLY MAN'S HANDBOOK 



upstream side of the sill. The beech piling is driven 

 so that the top of it is level with the centre of the 

 sill, and the screen rests on the top of the beech 

 piling. 



Drive i|-in. boards, pointed at the base like piles 

 at each side, to fill up the space between the pile B 

 at the end of the screen and the pile A at the inner 

 end of the wing, and cut them off at a convenient level 

 above the surface of the water. Match-board the 

 space from the pile B at the end of the screen 

 diagonally to the pile D at the lower end of the wing 

 on each side, down to the gravel and up to the level 

 of the i^-in. boards. A triangular compartment will 

 thus be formed, on each side of the stew, by the i^-in. 

 boards, the bank and the match-boarding. These 

 triangular spaces should be filled with concrete (of 

 one part cement to three of clean gravel) which, when 

 set, will form piers as solid as any brickwork. A 

 reference to the plan, Plate XXXIX, showing the 

 arrangement and construction of the piers, sill, and 

 screen, will assist the reader and enable any moderately 

 handy and intelligent man to carry out the work. 



The handrails across each screen are nailed to the 

 piles. A length of timber 6 in. by 3 in. (long enough 

 to reach from the head of the pile to the surface of the 

 sill) must be nailed to each of the three piles to which 

 the screen is to be attached. Planks laid across the 

 stew at the screens are useful for feeding or other 

 purposes. The screens themselves are fastened in 

 place by screws or staples to the sill at the bottom. 



