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 and there you will commonly kill the best fish; but if the wind be little or none at all, you must angle in the swift streams."