The Entheticus de dogmate philosophorum of John of Salisbury has come down to us in three manuscripts: a twelfth-century codex in the British Museum (Royal 13. D. IV); a fourteenth-century manuscript in the University Library at Cambridge (Ii. II. 31); a seventeenth-century codex now located in the Staatsbibliothek, Berlin (Hamburg Cod. Phil. 350). The editio princeps was published by Christian Petersen (Hamburg 1843), and it has remained the standard edition. However, important deficiencies in that work have made a complete re-examination of the text necessary.