The dispersal of the library amassed by George Spencer-Churchill (1766 1840), Marquess of Blandford and later fifth Duke of Marlborough, is most commonly cited today as a preservative against folly. The collection contained some of the most sought-after incunabula of a period defined by the high prices paid for early printed books. It included a fine selection of Caxtons, spectacular botanical and emblem books, and the iconic Valdarfer Boccaccio - the first edition of the Decameron, purchased by Blandford in 1812 for the unprecedented sum of 2,260. The Boccaccio was symptomatic of the...