James E. Walters (eds.), "Prefatory Letter" in last modified May 16, 2018, http://syriaca.org/work/8502 Prefatory Letter Aphrahat — ܐܦܪܗܛ http://syriaca.org/work/8502 Digital Syriac Corpus Prefatory Letter Aphraatis Sapientis Persae Demonstrationes Patrologia Syriaca part 1