Sentence:  When the weather is genial, at the times of hatching and coming on the water of these two flies, the trout generally take their <WSD>fulth</WSD> of them in preference to all others, when the natural flies only can succeed; but if rude, westling weather then prevails, it gives good imitations a chance. 
Meaning of the word marked with <WSD> tags:  Fill; sufficiency; repletion; satiety.