 In 1570 Wilson published a translation, the first attempted in English, of the "Olynthiacs" and "Philippics" of Demosthenes, on which he had been engaged since 1556.His "Discourse upon Usury", which he dedicated to Robert Dudley, Earl of Leicester, his patron and former pupil, appeared in 1572.In his will proved in 1582, Thomas Wilson refers to his brother Godfrey Wilson of Durham, and calls Sir William Wynter his brother-in-law.