It is least accurate for the earliest period, down to 1052, and is most substantial for the reigns of the Staufer kings Frederick II (1197–1250) and Manfred (1258–1266).
[1] They are: The editio princeps (first edition) of the Annales was printed at Palermo in 1723 as part of the Bibliotheca Historica Regni Siciliae of Giovanni Battista Caruso [it].
He ignored the break in the Vatican manuscript and treated the Annales and the stylistically distinct Historia as a unit.
[4] He also published the Annales separately with the short introduction Post haec piissimus comes under the title Appendix ex Codice Marchionis Farratanae ad ultimum capitulum Libri Quarti Historiae Gaufredi Malaterrae ("appendix from the codex of the marquis of Giarratana to the last chapter of the fourth book of the history of Geoffrey Malaterra").
As a result, the Annales is commonly known as the Appendix ad Malaterram, although that term is better applied only to the introductory text Post haec piissimus comes.