The affair of Sprot has an obvious bearing on that other mystery, the authenticity of the Casket Letters attributed to Queen Mary. As we know, she, though accused, was never allowed to see the letters alleged to be hers. We know that, in December 1568, these documents were laid before an assembly of English nobles at Hampton Court. They were compared, for orthography and handwriting, with genuine letters written by the Queen to Elizabeth, and Cecil tells us that ‘no difference was found.’ It was a rapid examination, by many persons, on a brief winter day, partly occupied by other business. If experts existed, we are not informed that they were present. The Casket Letters have disappeared since the death of the elder Gowrie, in 1584. From him, Elizabeth had vainly sought to purchase them. They were indispensable, said Bowes, her ambassador, to ‘the secrecy of the cause.’ Gowrie would not be tempted, and it is not improbable that he carried so valuable a treasure with him, when, in April 1584, he retired to Dundee, to escape by sea if the Angus conspiracy failed.
At Dundee he was captured, after defending the house in which he was residing. That house was pulled down recently; nothing was discovered. But fable runs that, at the destruction of another ancient house in Dundee, ‘Lady Wark’s Stairs,’ a packet of old letters in French was found in a hiding hole contrived within a chimney. The letters were not examined by any competent person, and nobody knows what became of them. Romance relates that they were the Casket Letters, entrusted by Gowrie to a friend. It is equally probable that he yielded them to the King, when he procured his remission for the Raid of Ruthven. In any case, they are lost.
Consequently we cannot compare the Casket Letters with genuine letters by Mary. On the other hand, as I chanced to notice that genuine letters of Logan’s exist at Hatfield, I was enabled, by the kindness of the Marquis of Salisbury, and of Sir Stair Agnew, to have both the Hatfield Logan letters, and the alleged Logan letters produced in 1609, photographed and compared, at Hatfield and at the General Register House in Edinburgh. By good fortune, the Earl of Haddington also possesses (what we could not expect to find in the case of the Casket Letters) documents in the ordinary handwriting of George Sprot, the confessed forger of the plot-letters attributed to Logan. The result of comparison has been to convince Mr. Gunton at Hatfield, Mr. Anderson in Edinburgh, Professor Hume Brown, and other gentlemen of experience, that Sprot forged all the plot-letters. Their reasons for holding this opinion entirely satisfy me, and have been drawn up by Mr. Anderson, in a convincing report. To put the matter briefly, the forged letters present the marked peculiarities of Logan’s orthography, noted by the witnesses in 1609. But they also contain many peculiarities of spelling which are not Logan’s, but are Sprot’s. The very dotting of the ‘i’s’ is Sprot’s, not Logan’s. The long ‘s’ of Logan is heavily and clumsily imitated. There is a distinct set of peculiarities never found in Logan’s undisputed letters: in Sprot’s own letters always found. The hand is more rapid and flowing than that of Logan. Not being myself familiar with the Scottish handwriting of the period, my own opinion is of no weight, but I conceive that the general effect of Logan’s hand, in 1586, is not precisely like that of the plot-letters.
My point, however, is that, in 1609, Sprot’s forgeries were clever enough to baffle witnesses of unblemished honour, very familiar with the genuine handwriting of Logan. The Rev. Alexander Watson, minister of the Kirk of Coldinghame (where Logan was wont to attend), alleged that ‘ the character of every letter resembles perfectly Robert’s handwrit, every way .’ The spelling, which was peculiar, was also Logan’s as a rule. Mr. Watson produced three genuine letters by Logan, before the Lords of the Articles (who were very sceptical), and satisfied them that the plot-letters were the laird’s. Mr. Alexander Smith, minister of Chirnside, was tutor to Logan’s younger children; he gave identical evidence. Sir John Arnott, Provost of Edinburgh, a man of distinction and eminence, produced four genuine letters by the Laird, ‘agreeing perfectly in spelling and character with the plot-letters. The sheriff clerk of Berwick, William Home, in Aytoun Mill (a guest, I think, at Logan’s ‘great Yules’), and John Home, notary in Eyemouth, coincided. The minister of Aytoun, Mr. William Hogg, produced a letter of Logan to the Laird of Aytoun, but was not absolutely so certain as the other witnesses. ‘He thinks them’ (the plot-letters) ‘like [to be] his writing, and that the same appear to be very like his write, by the conformity of letters and spelling.’ [243a]
Thus, at the examination of Logan’s real and forged letters, as at the examination of Queen Mary’s real and Casket letters, in spelling and handwriting ‘no difference was found.’ Yet the plot-letters were all forged, and Mr. Anderson shows that, though ‘no difference was found ,’ many differences existed. Logan had a better chance of acquittal than Mary. The Lords of the Articles, writes Sir Thomas Hamilton to the King (June 21, 1609), ‘had preconceived hard opinions of Restalrig’s process.’ [243b] Yet they were convinced by the evidence of the witnesses, and by their own eyes.
From the error of the Lords of the Articles, in 1609, it obviously follows that the English Lords, at Hampton Court, in 1568, may have been unable to detect proofs of forgery in the Casket Letters, which, if the Casket Letters could now be compared with those of Mary, would be at once discovered by modern experts. In short, the evidence as to Mary’s handwriting, even if as unanimously accepted, by the English Lords, as Cecil declares, is not worth a ‘hardhead,’ a debased copper Scottish coin. It is worth no more than the opinion of the Lords of the Articles in the case of the letters attributed to Restalrig.