London: Printed for R. Royston, 1671. 202 pages. 5 1/2 x 3 1/4 inches. Later calf with gilt; leather dry, hinges starting. With the bookplate of George Frisbie Hoar, Senator from Massachusetts. Item #3868
Second edition, originally published in 1657. "A very charming piece of work of a lighter kind was inspired by a question from his friend, Mrs. Katherine Phillips (the "matchless Orinda"), asking "How far is a dear and perfect friendship authorized by the principles of Christianity?" In answer to this he dedicated to the most ingenious and excellent Mrs. Katherine Phillips his Discourse of the Nature, Offices and Measures of Friendship" - NNDB online.