Experienced Angler, or Angling Improved

Excerpt: "When you angle with the artificial fly, you must either fish in a river not fully cleared from some rain lately fallen, that had discoloured it; or in a moorish river, discoloured by moss or bogs; or else in a dark cloudy day, when a gentle gale of wind moves the water; but if the wind be high, yet so as you may guide your tools with advantage, they will rise in the plain deeps, and then...