Sir John Harington (1560-1612) was a godson of Queen Elizabeth and the author of "Orlando Furioso in English Heroical Verse", but a man of singularly unsuccessful career, and with a reputation for folly and indiscretion. One such indiscretion - the agreement to act as guarantor for the debt of an uncle - had landed him temporarily in the Tower of London in 1603, the year of James I's accession to the throne. The Sixth Book of Virgil's "Aeneid" - clearly an attempt to win the new sovereign's favour - was presented to the King the following year, for his son Prince Henry, the ten-year-old heir apparent. The manuscript of this work, long thought to be lost, is here published for the first time. The manuscripts consist of 162 neatly written pages, containing an epistle to the King, parallel English and Latin texts (the latter added, after the first 8 lines, by a scribe), marginal explanatory notes, and a "comment" in seven chapters.