Autograph letter signed, William Thomson to David Steuart Erskine, earl of Buchan, at Dryburgh Abbey.
Concerning the publication by Debrett's of Erskine's Essays on the lives and writings of Fletcher of Saltoun [London, 1792] together with observations on the earl's brothers as students at the university of St Andrews. Signed William Thomson. London, 11 March 1792.