Michael Angelo and Titian lived to eighty-nine and ninety-nine respectively.

Harvey, the discoverer of the circulation; Hans Sloane, the celebrated president of the Royal Society in London; Plater, the Swiss physician; Duverney, the anatomist, as well as his confrere, Tenon, lived to be octogenarians.

Many men have displayed activity when past four score.

Brougham at eighty-two and Lyndhurst at eighty-eight could pour forth words of eloquence and sagacity for hours at a time.

Landor wrote his "Imaginary Conversations" when eighty-five, and Somerville his "Molecular Science" at eighty-eight; Isaac Walton was active with his pen at ninety; Hahnemann married at eighty and was working at ninety-one.
J.B.Bailey has published a biography of "Modern Methusalehs," which includes histories of the lives of Cornaro, Titian, Pletho, Herschell, Montefiore, Routh, and others.