Robert Venables, The Experienced Angler; or Angling Improved (1825)
“ The fish participating of the nature of the muddy river, which is ever slow, for if they were swift, the stream would cleanse them from all mud, are not so quick, lively, and active, as those bred in swift, sandy, or stony rivers, and so coming to the fly with more deliberation, discern the same to be counterfeit, and forsake it; whereas, on the contrary, in stony, sandy, swift rivers, being colder, the fish are more active, and so more hungry and eager, the stream and hand keeping the fly in continual motion, they snap the same up without any pause, lest so desirable a morsel escape them. ”
