“’In my library at Strawberry Hill are two wainscot chests or boxes, the larger marked with an A, the lesser with a B:- I desire, that as soon as I am dead, my executor and executrix will cord up strongly, and sell the larger box, marked A, and deliver it to the Honourable Hugh Conway Seymour, to be kept by him unopened and unsealed till the eldest son of Lady Waldegrave, or whichever of her sons, being Earl of Waldegrave, shall attain the age of twenty-five years; when the said chest, with whatever it contains, shall be delivered to him for his own.  And I beg that the Honourable Hugh Conway Seymour, when be shall receive the said chest, will give a promise in writing, signed by him, to Lady Waldegrave, that he or his representatives will deliver the said chest, unopened and unsealed, by my executor and executrix, to the first son of Lady Waldegrave who shall attain the age of’ twenty-five years.  The key of the said chest is in one of the cupboards of the green closet, within the blue breakfast room, at Strawberry Hill; and that key, I desire, may be delivered to Laura, Lady Waldegrave, to be kept by her till her son shall receive the chest.’  “‘March 21st, 1790.’”

(Signed) Hon.  Horace walpole, earl of orford.’  Aug. 19, 1796.’

“In obedience to these directions, the box described in the preceding memorandum was corded an(] sealed with the seals of the Honourable Mrs. Damer and the late Lord Frederick Campbell, the executrix and executor of Lord Orford, and by them delivered to the late Lord Hugh Seymour, by whose representatives it was given up, unopened and unsealed, to the present Earl of Waldegrave, when he attained the age of twenty-five.  On examining the box, it was found to contain a number of manuscript volumes and other papers, among which were the Memoires now published.’ "

“The correspondence of Horace Walpole with Sir Horace Mann, now first published, was also contained in the same box.  It appears that Walpole, after the death of Sir Horace, became again the possessor of his own letters.  He had them copied very carefully in three volumes, and annotated them with short notes, explanatory of the persons mentioned in them, with an evident view to their eventual publication.  “It is from these volumes that the present publication is taken.  The notes of the author have also been printed verbatim.  As, however, in the period of time which has elapsed since Walpole’s death, many of the personages mentioned in the letters, whom he appears to have thought sufficiently conspicuous not to need remark, have become almost forgotten, the Editor has deemed it necessary to add, as shortly as possible, some account of them; and he has taken care, whenever he has done so, to distinguish his notes from those of the original author, by the letter D. placed at the end of them.