He then travelled abroad and was at Venice in July 1594 where he was approached by English Catholics, presumably with the intention of involving him in one of the numerous conspiracies against Elizabeth I which were rife in that decade.
His first wife, Lady Mary Sackville, was a confirmed Catholic who taught her children to follow that faith.
[6] In June 1597 he was licensed to travel abroad for two years with his brother-in-law Thomas Sackville, son of Lord Buckhurst, later Earl of Dorset.
Buckhurst and Nevill owned several iron foundries between them, and by December 1596 they had a patent which gave them a monopoly in the production of ordinance.
Nevill is mentioned sitting on a committee considering the Penal Laws on 2 November, somewhat ironically in view of his own well-known Catholic leanings.