Nor were his entire interests Johnsonian. Scattered through his writings we find allusions to other books, in a more or less forward stage of completeness, and of which some must have been destroyed by his faithless executors. We hear of a _Life of Lord Kames_; an _Essay on the Profession of an Advocate_; _Memoirs_ of Hume when dying, 'which I may some time or other communicate to the world;' a quarto with plates on _The Beggar's Opera_; a _History of James IV._, 'the patron of my family;' a _Collection of Feudal Tenures and Charters_, 'a valuable collection made by my father, with some additions and illustrations of my own;' an _Account of my Travels_, 'for which I had a variety of materials collected;' a _Life of Sir Robert Sibbald_, 'in the original manuscript in his own writing;' a _History of the Rebellion of 1745_; an edition of _Walton's Lives_; a _Life of Thomas Ruddiman_, the Latin grammarian; a _History of Sweden_, where three of his ancestors had settled, who took service under Gustavus Adolphus; an edition of _Johnson's Poems_, 'a complete edition, in which I shall with the utmost care ascertain their authenticity, and illustrate them with notes and various readings;' a work on _Addison's Poems_, in which 'I shall probably maintain the merit of Addison's poetry, which has been very unjustly depreciated.' His _Journal_, which is unfortunately lost, he designed as the material for his own _Autobiography_. A goodly list, and a varied one, involving interest, knowledge, and research, fit to form the equipment of a professed scholar.