The prisoners, meanwhile, were removed to London, examined before the Privy Council, and then transmitted to Maidstone Jail to await their trial. The source of the information which caused these historic arrests on February 27, 1798, has hitherto remained a mystery. Father O'Coigly, while in jail, wrote some letters, in which he failed to avow his share in the conspiracy, but admitted to have made a previous visit to Cuxhaven. This was part of the city of Hamburg. Turner, in addition to being the official agent of the United Irishmen at Hamburg, was an old Dundalk acquaintance of O'Coigly's, and no doubt was promptly hailed by the country priest. Turner and O'Coigly are mentioned in Hughes's information. They belonged to the same district organisation. After describing Teeling, Turner and Lowry working in concert in 1797, Hughes adds that priest Quigly or O'Coigly introduced him at that time to Baily and Binns.[41] The paper revealed by Mr. Froude, now shown to be Turner's, and other letters from the same hand in the 'Castlereagh Papers,' show that the writer always felt a strong dislike to work with the 'Papists,' especially priests. 'Casey, the red-faced, designing Dublin priest,' was one of the leading men he met in Dublin, and whose 'prudence or cowardice' disgusted him. Immediately after O'Coigly's return to London we find the authorities on his track. The priest himself refers to an abortive attempt to arrest him by night at Piccadilly.[42] Mr. Froude, dealing with this case, does not seem to have suspected that the arrival in London of Downshire's friend, at the time of the arrests at Margate, was other than accidental. Yet clearly it was business of no ordinary moment which brought him back to London at this time. It will be remembered that, panic-stricken and fearing death from the assassin's knife, he had returned to Hamburg in October 1797, ere an answer came from Pitt to the proposition of betrayal conveyed by Lord Downshire. It happened that at this particular time [writes Mr. Froude] that Downshire's friend was in London, and Pelham (the Irish Secretary) knew it. If the 'friend' could be brought over, and could be induced to give evidence, a case could then be established against all the United Irish leaders. They could be prosecuted with certainty of conviction, and the secrets of the plot could be revealed so fully that the reality of it could no longer be doubted.