The tract now published in the following volume, is printed from a MS. in my possession, collated with the transcript of another in the Library of the Monastery of St Augustine in Cadiz. It is a small black-letter quarto of the sixteenth century, containing thirty-four pages of vellum, illuminated with small, plain, capitals, such as the ordinary initials of inferior missals. It was once in the possession of the historian and faithful adherent of Queen Mary, John Lesley, bishop of Ross, as appears by his signature in the first leaf—“Jo. Rossen.” Immediately below is noted, in his small neat hand, “Primo Maii, 1571, I tuck my feaver and ageu at ix huris at ny^t.”... Some of the many calamities which scattered the adherents of the house of Stuart, and brought together many of their persons and their remains in the Catholic seclusions of the Continent, conveyed the _Vestiarium Scoticum_, and many papers of the Bishop of Ross into the Library of the Scots College at Douay. During the long incognito of the prince Charles Edward, between the years 1749 and 1754, he visited that seminary, for purposes which expired in the obscurity wherein they were planned; and, during his stay, he received from the fathers many papers which had belonged to Queen Mary, her adherents, and King James the Seventh. Among others, of a very different nature, was found the Bishop of Ross’s copy of the _Vestiarium Scoticum_. This copy, now in my possession, being the oldest and the most perfect, has served as the original to the present publication. The next in value, that which belonged to the Library of the Convent of St Augustine, is a small paper folio, bound in panel, written in the ordinary running hand of the time of James the Sixth. By the signature and date, it had at one time belonged to “ane honerabil man Maister James Dunbarre w^tin y^e burg of Innernesse, in y^e yeir of God ain thousand sax hunder and aucht yeirs.” By a subsequent name upon the cover—“_Johan O’Neil_, cleric”—it had probably passed into the hands of one of the many expatriated Irish priests, who were driven to the Continent, during the reigns of Elizabeth and James the Sixth; and, in this revolution, probably found its way into the Monastery of St Augustine. Spain was at that time the principal sanctuary for the Irish and Island refugees; and it is not improbable that the possessor of the volume might have been one of the followers of the unfortunate James M^cDonald of Isla and the Glens, who, on his expulsion from Ulster and the Isles, fled to the Court of Philip the Third. Between this copy and that of the Bishop of Ross there are but very few variations, and almost all, apparently, accidental omissions of the copyist: wherever they occur they have been noted on the margin of this edition.