Came across this and thought it might be useful.
http://books.google.com/books?q=fly+fishing&btnG=Search+Books&as_brr=1
Quite liked the start of this one :)
http://books.google.com/books?vid=OCLC06140513&id=wEACAAAAQAAJ&pg=RA2-PR9&lpg=RA2-PR9&dq=fly+fishing
May be of interest;
http://www.archive.org/details/FishingAngle
http://darkwing.uoregon.edu/~rbear/berners/berners.html
http://etext.library.adelaide.edu.au/w/walton/izaak/w23c/chap07.html
http://www.uoregon.edu/~rbear/barker1.html
TL
MC