The 13th-century chronicler Roger of Wendover used Henry's work as his main source and it is probable that both Henry and Roger had access to information from manuscripts and oral sources now lost.
O cronista do século XIII, Roger de Wendover utilizou o traballo de Henrique como a súa fonte principal, sendo probábel que tanto Henrique como Roger tivesen acceso a manuscritos e a fontes orais agora perdidas.