This, however, I did not learn but by experience, and till I had already ruined my health, though I was not sensible of it. Some scurvy spots broke out on my fingers the first winter I fell ill, about which I consulted a very knowing physician, who gave me some medicine that removed these symptoms, and at the same time gave me a warning against the vapours, which, though I was labouring under at that time, I fancied myself so far removed from, and indeed from any other disease, except a slight scurvy, that I despised his warning. At last, about April 1730, when I was nineteen years of age, a symptom, which I had noticed a little from the beginning, increased considerably; so that, though it was no uneasiness, the novelty of it made me ask advice; it was what they call a ptyalism or wateryness in the mouth. Upon my mentioning it to my physician, he laughed at me, and told me I was now a brother, for that I had fairly got the disease of the learned. Of this he found great difficulty to persuade me, finding in myself nothing of that lowness of spirit, which those who labour under that distemper so much complain of. However upon his advice I went under a course of bitters, and anti-hysteric pills, drank an English pint of claret wine every day, and rode eight or ten Scotch miles. This I continued for about seven months after. "Though I was sorry to find myself engaged with so tedious a distemper, yet the knowledge of it set me very much at ease, by satisfying me that my former coldness proceeded not from any defect of temper or genius, but from a disease to which any one may be subject. I now began to take some indulgence to myself; studied moderately, and only when I found my spirits at their highest pitch, leaving off before I was weary, and trifling away the rest of my time in the best manner I could. In this way, I lived with satisfaction enough; and on my return to town next winter found my spirits very much recruited, so that, though they sank under me in the higher flights of genius, yet I was able to make considerable progress in my former designs. I was very regular in my diet and way of life from the beginning, and all that winter made it a constant rule to ride twice or thrice a-week, and walk every day. For these reasons, I expected, when I returned to the country, and could renew my exercise with less interruption, that I would perfectly recover. But in this I was much mistaken; for next summer, about May 1731, there grew upon me a very ravenous appetite, and as quick a digestion, which I at first took for a good symptom, and was very much surprised to find it bring back a palpitation of heart, which I had felt very little of before. This appetite, however, had an effect very unusual, which was to nourish me extremely; so that in six weeks' time, I passed from the one extreme to the other; and being before tall, lean, and raw-boned, became on a sudden the most sturdy, robust,