structural:reformatting
Other writings

Geoffrey's earliest writing was probably the Prophetiae Merlini (Prophecies of Merlin) which he wrote before 1135, and which appears both independently and incorporated into The History of the Kings of Britain. It consists of a series of obscure prophetic utterances attributed to Merlin which he claimed to have translated from an unspecified language.

The third work attributed to Geoffrey is the hexameter poem Vita Merlini (Life of Merlin), based more closely on traditional material about Merlin than the other works. Here he is known as Merlin of the Woods (Merlinus Sylvestris) or Scottish Merlin (Merlinus Caledonius) and is portrayed as an old man living as a crazed and grief-stricken outcast in the forest. The story is set long after the timeframe of the History ' s Merlin, but the author tries to synchronise the works with references to the mad prophet's previous dealings with Vortigern and Arthur. The Vita did not circulate widely, and the attribution to Geoffrey appears in only one late 13th-century manuscript, but it contains recognisably Galfridian elements in its construction and content, and most critics recognise it as his.