CHAPTER VII. PERCY, CATESBY, AND TRESHAM. ON occasion of a notorious trial in the Star Chamber, in the year 1604,[292] Bancroft, the Archbishop of Canterbury, made the significant observation[293] that nothing was to be discovered concerning the Catholics "but by putting some Judas amongst them." That amongst the Powder Plot conspirators there was some one who played such a part, who perhaps even acted as a decoy-duck to lure the others to destruction, has always been suspected, but with sundry differences of opinion as to which of the band it was. Francis Tresham has most commonly been supposed at least to have sent the warning letter to Monteagle, which proved fatal to himself and his comrades: some writers have conjectured that he did a good deal more.[294] Monteagle himself, as we have seen, has been supposed by others to have been in the Plot and to have betrayed it. It would appear, however, that neither of these has so strong a claim to this equivocal distinction as one whose name has been scarcely mentioned hitherto in such a connection. The part played in the conspiracy by Thomas Percy is undoubtedly very singular, and the more so when we learn something of the history and character of the man. Till within some three years previously[295] he had been a Protestant, and, moreover, unusually wild and dissolute. After his conversion, he acquired the character of a zealous, if turbulent, Catholic, and is so described, not only by Father Gerard and Father Greenway, but by himself. In a letter written so late as November 2nd, 1605,[296] he represents that he has to leave Yorkshire, being threatened by the Archbishop with arrest, "as the chief pillar of papistry in that county." It unfortunately appears that all the time this zealous convert was a bigamist, having one wife living in the capital and another in the provinces. When his name was published in connection with the Plot, the magistrates of London arrested the one, and those of Warwickshire the other, alike reporting to the secretary what they had done, as may be seen in the State Paper Office.[297]