The postscript is separately paginated., Extra-illustrated, interleaved copy, with Horace Walpole's note on title-page: "With MSS alterations by Mr. Mason." Mason sent his proposed alterations to Horace Walpole in a Ietter, 8 May 1769; Horace Walpole thanked him warmly, but wrote on Mason's letter that he did not wish to adopt the alterations. Mason mentioned the book in his letter to Horace Walpole, 15 May 1781; after Mason's death it is first reported in a letter (tipped in the book) from Lord Carlingford to F.W. Cozens, 8 May 1878, assuring him that the notes are by Mason., Horace Walpole's corrections: p. 8 and 34. Also with unidentified ms. notes., Lower right corner of leaf C2 torn with some loss of text., Bound in red morocco ca.1870 by Jenkins &: Cecil., With the armorial bookplates of C.G. Milnes Gaskell and S.A. Courtauld., and Autograph letter signed Lord Carlingford to F.W. Cosens, 8 May 1878 bound in.
