Mr. Froude, quoting from the betrayer's letter to Downshire, writes:—'I went to Harley Street, where Fitz[116] told me of the conduct of the Catholics to him and his friends. He said he would prevail on O'Connor, or some such,[117] to go to Paris; if not, he would go himself, in order to have Lewins removed.'

Lord Edward came to this decision obviously on the representations made by his false friend regarding Lewins. The false friend will be found impugning Lewins on every opportunity. Turner and Lewins, it may be repeated, clashed as rival envoys; Lewins, a Catholic, represented the Leinster Directory, while Turner claimed to represent the Northern. Turner worked his pen and tongue to such purpose that he at last succeeded in convincing Lord Edward of Lewins's treachery. Binns, in his narrative, states that 'O'Coigly had been commissioned by the Executive to supersede Lewins in Paris, whom some suspected of betraying the interests of Ireland.'[118]

The letter from Hamburg (first revealed by Mr. Froude) continues:—

Mrs. Matthieson[119] has just heard from Lady Lucy that O'Connor is come. I supped last night with Valence, who mentioned his having introduced Lord Edward[120] and O'Connor to the Minister here[121] in the summer before the French attempted to invade Ireland.[122] They both went to Switzerland, whence O'Connor passed into France, had an interview with Hoche, and everything was planned.

I feared lest Government might not choose to ratify our contract, and, being in their power, would give me my choice either to come forward as an evidence or suffer martyrdom myself. Having no taste for an exit of this sort, I set out and arrived here safe, and now beg you will let me know if anything was wrong in my statements, or if I have given offence....

One of the many unexplained letters in the Castlereagh Correspondence finds its keynote here. In August, 1798, Wickham, of the Home Office, writes as follows to Castlereagh, who then held O'Connor a prisoner in Dublin.[123] Wickham's object, though shrouded in mystery, was no doubt to check the accuracy of 'Lord Downshire's friend,' and to weigh the marketable value of his services:—

It would be a great satisfaction to me, personally, were O'Connor to be questioned on the object of his journey to Switzerland with Lord Edward Fitzgerald in 1796, and whether they, or either of them, were in France at that time, and what French agents they saw besides M. Barthélemy. I was absent with the Austrian army at the time of their arrival, so that I lost the opportunity of observing their motions.[124] If either of them went into France, which I am persuaded they did, I should be curious, for very particular reasons, to know whether they went in by way of Basle, and whether their passports were given in their own names. Should there be no impropriety in questioning O'Connor on these points, as I have said before, it would be a great satisfaction to me that it should be done.[125]

Fifty pages may be turned ere the answer to this letter comes. It is headed 'Secret,' and bears date 'Dublin Castle, August 17, 1798.' All my circumstantial evidence, aiming to show that Turner is the man whom Mr. Froude could not identify, is crowned by this letter. Castlereagh thus replies to Wickham:—

'Secret. 'Dublin Castle: August 17, 1798.

'I have endeavoured to obey your commands in examining Mr. O'Connor as to the object of his journey to Switzerland with Lord Edward Fitzgerald. At first he declined answering to this point, considering himself as only bound to state the facts which came to his knowledge after he became a United Irishman, of which body he was not then a member. Upon being pressed, without mentioning names, he stated it thus:—In the summer of 1796, as set forth in the Memoir, an agent was sent to France to arrange with the Directory the plan of invasion. This person went to Hamburg; from thence, accompanied by his friend, to Switzerland; neither went to Paris, but the person employed had an interview near the French frontier with a person high in the confidence of the Directory; upon a communication with whom everything was settled.[126] The reason neither proceeded to Paris was lest the English Government, in whose pay most of the officers in Paris were supposed[127] to be, should suspect the design, and arrest the persons on their return.