Mac Carthaigh’s Book is a collection of annals of the period AD 1114–1437 inclusive. It was compiled from earlier material by Fínghin Mac Carthaigh Mór (c. 1560–1640) an Irish nobleman who was imprisoned for years in London. He was a patron of learning and a scholar in his own right. While in London in 1633 he employed Diarmaid Ó Súilleabháin who also kept the book in his castle until it was sacked by Radhulbh MacAmlaoibh, then his clan took control of it, they copied and compiled these annals for him.