Justin Martyr (130-160)
nA student of the Greek philosophers, Justin was converted to Christianity as an adult by talking to an elderly believer.  He spent the rest of his life as a traveling Christian philosopher and died as a martyr.
nIn his two Apologies to the Roman emperor and his Dialogue with the Jewish scholar Trypho, Justin speaks of the “Gospels” and calls them “memoirs of the apostles and those who followed them.”
nHe uses our four Gospels and no others.