From that date until Bacon's death in 1601 Morison seems to have frequently corresponded with him, but few of his letters are preserved (Birch, Memoirs of the Reign of Queen Elizabeth, i.
Early in 1593 Morison appears to have been at Frankfort, where he published his first book, 'Liber novus de Metallorum causis et Transubstantione,' 1593, 8vo (Brit.
In the same year Morison returned to Scotland, and through Bacon's influence became one of Essex's 'earliest, as well as most considerable, intelligencers there' (Birch).
During a visit to the north of Scotland he fell in with the Earl of Huntly, and secured considerable influence with him, which Morison thought might be of use to the queen's envoys.
On 5 Feb. 1593-4 Morison dedicated to James his second book, 'Papatus, seu depravatæ religionis Origo et Incrementum,' Edinb.
In spite of its fanciful alphabetical arrangement, it is a learned work, compiled from more than two hundred authors, and tracing the history of the papacy from its origin to the Reformation.
Next year he was back again in Scotland sending accounts to his patron of James's behaviour and views on domestic and foreign policy, and describing the movements of Huntly, Erroll, Angus, and a Jesuit, John Morton, who had been Morison's schoolfellow (Birch, i.