The old man's guide to health and longer life: with rules for diet, exercise, and physic; for preserving a good constitution, and preventing...

"IT may be expected, I should now say, at what period of life the state of it that we call aged begins, but nature has herself left this undeterminable. The weakness and infirmities of age come at different years, in different constitutions: I could at this hour point out a very young man of eighty-seven: and the purlieus of Covent-Garden abound with very old men at seven-and-twenty: but to speak in general terms, it may be said, that the period of life, for which we are giving rules and regulations, begins about fifty-eight; tho' the greater infirmities of age do not advance till several years after."
This is an edition of a classical book first published in the eighteenth century.