Robinson Crusoe by Daniel Defoe Chapter 6 Page 36

From the 4th of July to the 14th I was chiefly employed in walking about with my gun in my hand, a little and a little at a time, as a man that was gathering up his strength after a fit of sickness; for it is hardly to be imagined how low I was, and to what weakness I was reduced. The application which I made use of was perfectly new, and perhaps which had never cured an ague before; neither can I recommend it to any to practise, by this experiment: and though it did carry off the fit, yet it rather contributed to weakening me; for I had frequent convulsions in my nerves and limbs for some time. I learned from it also this, in particular, that being abroad in the rainy season was the most pernicious thing to my health that could be, especially in those rains which came attended with storms and hurricanes of wind; for as the rain which came in the dry season