Chess: A Road to Health and Wealth?

H. J. R. Murray, A History of Chess (Oxford UP, 1913), p. 164:

Hippocrates and Galen apparently found in chess a potent antidote to diarrhoea and erysipelas, and prescribed it with success, while Aristotle figures among the many hypothetical inventors of chess. Another story tells how Galen once met a friend whom he had not seen for some time, and learnt that he had been into the country to see a farm which he had purchased with the result of his gains at chess, whereupon the physician exclaimed with what sounds like a strong flavour of irony, 'What a fine thing chess is, and how profitable!' Pure fiction, the whole of it, of course.