The Supplement to "The Antiquities" was resumed in 1783, this time with a higher proportion of the illustrations being done by other artists. Drawing on his own fieldwork, Grose also branched out into producing dictionaries, including the famous "A Classical Dictionary of the Vulgar Tongue" (1785) and "A Provincial Glossary, with a Collection of Local Proverbs, and Popular Superstitions" (1787). Though intended to amuse, they give an unusually vivid picture of the speech of the day which would not normally find inclusion in standard dictionaries, and contained, in all, about 9,000 terms which more scholarly works of the time habitually overlooked. He produced books on military antiquities and armour, as well as satirical essays, and in 1788 began the first of several tours of Scotland in order to produce "The Antiquities of Scotland". It was on the second of these tours, in summer 1789, that he met and immediately formed a friendship with the poet Robert Burns. Burns met him while he was staying with Robert Riddell at the Friar's Carse, collecting material for his Scottish work. Burns suggested to him that he should include Alloway Kirk in his Scottish "Antiquities", and Grose agreed on condition that Burns provided a witch tale to go with his drawing. In June 1790, Burns sent Grose a prose tale with a variant in a letter to Grose, following it up with a rhymed version, "Tam o' Shanter".