In 1589 he became caught up in a feud with Sir William Waldegrave, the chief landowner of Stoke by Nayland, after accusing Sir William, Lady Waldegrave, and others – with some justification – of offences including sedition and recusancy. Agas was convicted of slander by the Court of King's Bench and imprisoned for several months. In 1595 he distributed copies of a document in which he aired his grievances in this matter to several influential members of the county community, but found himself indicted before the Court of Star Chamber on a charge of issuing seditious pamphlets. The final outcome of this case is not known.