The identity of Matthioli with the prisoner known by the name of “the Iron Mask,” is here very satisfactorily confirmed by circumstantial evidence. We have seen that Matthioli and the Jacobin were placed together at Pignerol; we have seen that they were designated as “the two prisoners in the lower part of the tower;” we have seen that “the two prisoners in the lower part of the tower” were the only ones who accompanied St. Mars when his government was transferred to Exiles; we have seen the death of the Jacobin at the latter place; and now we find St. Mars conveying a single prisoner, designated as “_the prisoner_,” with him to St. Margaret, with a repetition of the same precautions and of the same secrecy as on former occasions, to which are added the celebrated Mask. Who could this prisoner be but Matthioli? It is also observable, that in all the various accounts of the Iron Mask, though the dates are made to vary, he is always said to have been originally confined at Pignerol, subsequently at the island of St. Margaret, and finally to have accompanied St. Mars to the Bastille. The prison of Matthioli, at the Island of St. Margaret, was a room lighted by a single window to the north, pierced in a very thick wall, guarded by bars of iron, and looking upon the sea.[132] During his residence in this place, his valet, who, as may be remembered, had been arrested by Estrades, and who had served his master ever since his confinement, died, and was buried at midnight, and with great secrecy. To supply his place, a woman of the neighbourhood was asked if she would undertake to wait upon the prisoner. At first she consented to accept of the place, imagining it might be a means of benefiting her family; but afterwards declined it, upon learning that she was to be cut off from all further intercourse with the world, and never even to see her family again.[133] Whether any one was eventually found to undertake the office, does not appear. Among the erroneous anecdotes that have obtained credence with regard to the Iron Mask, there are two, or rather apparently two versions of one event, which is said to have taken place while he was at the island of St. Margaret, but which is proved to be incorrect, by a letter published by M. Roux (Fazillac).