Our earlier article discussed the family of Sir Robert Tyrwhitt (d. 1581) of Kettleby in Lincolnshire and the imprisonment of Sir Robert and several of his sons by the Privy Council in June 1580. The Council was acting on a report of Catholic activities associated with the wedding of Edmund, Lord Sheffield and Ursula Tyrwhitt at the Tyrwhitt family homes of Kettleby and Twigmore. Sir Robert’s son Goddard died in a London gaol, and Goddard’s elder brothers William and Robert were imprisoned for years in the Tower and elsewhere. We turn now to the next generation of the same family, and show that Sir Robert’s grandson and heir, Robert Tyrwhitt, became a strong supporter of John Gerard SJ and the Jesuits in England during the years c.1600 to early 1606. Fr Gerard’s autobiography strains to make this clear, within the necessary limits of discretion. But just as the identity of the Tyrwhitt martyr of 1580 was soon totally lost to view, so Gerard’s identification of ‘one of my main benefactors’ as a Tyrwhitt has remained undecoded—hidden, indeed, by loose translation, and inattention to the different ways one can be a ‘brother in law’.