Schaff, Philip. History of the Christian Church (The Complete Eight Volumes in One). Amazon Kindle Edition, 2014.
Volume 2, Ante-Nicene Christianity A.D. 100-325, “Preface to the Third Edition Revised.”
Schaff notes the publication, recent at his time, of the manuscript of the Didache, which has sparked numerous revisions in his work and that of other scholars (Schaff 2014, Loc. 12026). Schaff’s third edition came out in 1885, but a fourth in 1886. A fifth was released in 1889 (Schaff 2014, Loc. 12044). This volume covers the period from the end of the apostolic age to the time of the Nicene Council in 325. Schaff surveys many developments in scholarship during the late 19th century. A number of manuscripts had been discovered, many of which shed light on discussions. These included “the crowning discovery of all, the Codex Sinaiticus, the only complete uncial MS of the Greek Testament” (Schaff 2014, Loc. 12063).
Along with manuscript discoveries, Schaff summarizes the many types of scholarship which bolossomed in the late 19th century (Schaff 2014, Loc. 12070). not only were there monumenta developments in literary theory and research, but the practice of archaeology was becoming more popular (Schaff 2014, Loc. 12076). Researchers had begun studying artifacts in the context of their original location.
Schaff continues in §1 with a bibliography for the Ante-Nicene Age (Schaff 2014, Loc. 12096). As always, he annotates some of the references to guide in interpretation.