Guard-book of miscellaneous letters and papers, including: (fols. 1-3) notes by Horace Walpole on James Granger's Biographical history; (fols. 4-6) letters from Walpole, (fol. 4) to Henry Fox, c.1761, and (fols. 5-6) to Jane Pope, 1790; (fols. 8-20) letters to Walpole from various correspondents, 1748-1772; (fols. 23-31) letters from…