On the eschatology of the Christian tradition’s major creeds, Jake Mailhot comments:
Though there are no charts or timelines in these creeds, they are profound. Christian hope is plain in Scripture, and it’s mirrored clearly in our creeds: Christ will come again to establish justice and peace forever.
Larry Hurtado discusses early Christian investment in texts with helpful reference to the detailed work of Randolph Richards, Paul and First-Century Letter Writing: Secretaries, Composition and Collection (InterVarsity Press, 2004).
Larry Hurtado also discusses the nature of “extant evidence” and inferences based on it, specifically in terms of early Christian texts.
The Christian Classics Ethereal Library, developed by Calvin College, again has very nicely formatted, searchable PDFs for the 38-volume Church Fathers set available for free, but donations are appreciated. The PDF for ANF, vol. 10, includes scanned page images. The other PDFs flow their text independently of the formatting and pagination of the original set, but the print set’s page numbers are included in marginal notations that are linked back to scanned page images on the CCEL website. A direct link to each volume’s information page is accessible from the A (ANF) and N (NPNF1, NPNF2) title browsing pages respectively.