this increased diet he grew seriously ill (at seventy-eight). But on returning to his old dietary he recovered. Hence, he concludes that “a man cannot be a perfect physician of anyone except of himself alone” and that by dint of experimenting he may “acquire a perfect knowledge of his own condition and of his most hidden qualities and find out what food and what drink and what quantities of each would agree with his stomach.” “Various experiments are absolutely necessary, for there is not so great a variety of features as there is diversity of temperaments and stomachs among men.” He found he could not drink wine over a year old, and that pepper injured but cinnamon helped him, something which no physician could have anticipated. He shows the fallacy of the notion that such a life leaves nothing to fall back upon in time of sickness by saying that such sickness would thus be avoided and that his dietary is sufficient so that in sickness, when all tend to eat less, he has still a sufficient margin, although probably the quantity or quality of food that suits him, he admits, might not suit others. The objection that many who lead irregular lives live to be old he refutes by saying that some have exceptional vitality but that all can prolong life by his method. He tells us that he rides without assistance, climbs hills, is never perturbed in soul, is occupied during the entire day, changes his residence in warm weather to the country which he thinks important, enjoys the society of able, cultivated, and active-minded men, and all his senses have remained perfect. He tells us that he improved upon Sophocles, who wrote a tragedy at seventy-three, for he has written a comedy; of his seven grandchildren, all offspring of one pair; how he enjoys singing (probably religious incantations), and how much his voice has improved; that he would not be willing to exchange “either my life or my great age for that of any young man,” etc. He praises his heart, memory, senses, brain, and is certain that he will die, when the time comes, without pain or illness and hopes to enjoy the other world beyond.