The version of the Gesta Herewardi which exists today is a transcription of this work, which was incorporated into a book containing charters and other material relating to the abbey at Peterborough known as the "Register of Robert of Swaffham", though variant descriptions such as "Robert of Swaffham's Book" are also found.
A versión da Gesta que existe hoxe é unha transcrición desta obra, a cal foi incorporada a un libro que contén estatutos e outros materiais relativos á Abadía de Peterborough coñecido como "Rexistro de Robert de Swaffham", aínda que tamén é chamado "o libro de Robert de Swaffham".