A small note-book, written from both ends, containing early exercises - extraction of the square and cube root, elementary Geometry, etc. - followed by annotations of Wallis's Arithmetica Infinitorum. This is preceded by a note of Newton's fixing by an entry in his account-book the date of the annotations as being in the winter 1664-1665, at which time he says he found the method of infinite series. Also notes on music, chances etc.