Thus where was Sprot’s motive for forging letters in Logan’s hand, and incriminating the Laird of Restalrig, and for carrying them about in his pocket in 1608? But where was his motive for confessing when taken and examined that he _did_ forge the letters, if his confession was untrue, while swearing, to his certain destruction, that he had a guilty foreknowledge of the Gowrie conspiracy? He _might_ conciliate Government and get pardoned as King’s evidence, by producing what he called genuine Logan letters, and thus proving the conspiracy, and clearing the King’s character; but this he did not do. He swore to the last that Logan and he were both guilty (so Calderwood’s authority rightly reported), but that the plot letters were forged by himself, to what end Calderwood did not say. All this appeared midsummer madness. Calderwood, it was argued, must be in error. A theory was suggested that Sprot really knew nothing of the Gowrie mystery; that he had bragged falsely of his knowledge, in his cups; that the Government pounced on him, made him forge the letters of Logan to clear the King’s character by proving a conspiracy, and then hanged him, still confessing his guilt. But Mr. Mark Napier, a learned antiquary, replied (in a long Appendix to the third volume of the History by the contemporary Spottiswoode) to this not very probable conjecture by showing that, when they tried Sprot, Government produced no letters at all, only an alleged account by Sprot of two letters unproduced. Therefore, in August 1608, Mr. Napier argued, Government had no letters; if they had possessed them, they would infallibly have produced them. That seemed sound reasoning. In 1608 Government had no plot letters; therefore, the five produced in the trial of the dead Logan were forged for the Government, by somebody, between August 1608 and June 1609. Mr. Napier refused to accept Calderwood’s wild tale that Sprot, while confessing Logan’s guilt and his own, also confessed to having forged Logan’s letters. Yet Calderwood’s version (or rather that of his anonymous authority in MS.) was literally accurate. Sprot, in _private_ examinations (July 5, August 11, 1608), confessed to having forged all the letters but one, the important one, Letter IV, Logan to Gowrie. This confession the Government burked.