2 18th c Works on Swift Writing & Short Hand

Two 18th c. works on "Swift Writing" & Short Hand, one inscribed by the author: Wm. Tiffin. A New Help and Improvement of the Art of Swift Writing. London (1750). Large 8vo. Inscribed at front "The Author's Present to G.H." 52 p., plus pages of printed short hand with blanks and mss. practices. Full leather. + Wm. Mavor. Universal Stenography. (London 1785). Large 8vo. 8 plates (half of #4 torn away). Condition: Very good.