CH.Iv.] | FASTENING FOR BOB-FLIES. 59 
casting-line should be cut at the place where 
you wish the bob-fly to be attached, and the two 
ends placed overlapping one another. With each 
end (previously well soaked) you make a simple 
knot round the adjacent part of the casting-line, 
and draw them moderately tight. Then, having 
previously cut the gut attached to the bob-fly to 
the proper length, and tied a knot in it to pre- 
vent it from slipping, you insert the knotted end 
between the two pieces of the casting-line which 
lie between the knots, and give it a single turn 
round one of them. Then just draw these knots 
together. Pull down the gut of the bob-fly to 
the knot in it. Wet the knots once more in 
your mouth to make assurance doubly sure; pull 
each of those on the casting-line quite tight, and 
then the two firmly together. It is now complete. 
When clipping off the ends of the gut however 
remember to leave about a sixteenth of an inch 
projecting beyond each of the two knots in the 
casting-line. Should you wish to change your fly, 
you can then, taking hold of one end with your 
teeth and the other with a small pair of pliers, 
which no fly-book should be without, pull them 
apart, take out your fly, put in another, and 
draw them together again. This fastening, before 
