I've been corresponding with a man who recently "came home", and who's now discussing the matter with his non-denominational wife. (By the way, I ask your prayers for Rob and his wife as they work through the changes; her church background is filled with some anti-papist communions, so it hasn't been easy for her to adjust to his conversion.)
Autumn recently completed a college survey course on the life of St. Paul, the text of which was Paul: His Life and Teachings, by Wheaton College fellow John McRay. In the course of the conversation, I brought up St. Ignatius of Antioch. Rob wrote back: "It is funny that you mentioned St. Ignatius, as McRay also has some words concerning Ignatius' pleas in the Letter to the Smyrnaeans for the faithful to obey their bishop: 'No evidence for such an office [of bishop] exists prior to his writings. Ignatius is evidently trying to establish the position of a monarchial bishop rather than representing it as already in existence.' Hmm ...."
Now, it took me longer than intended to write my reply to this, due to highlighting, deleting and rewriting some pretty uncharitable thoughts concerning Mr. (Prof.? Dr.?) McRay (who's no longer listed as on the faculty at Wheaton). While I was writing it, I did realize that the New International Version talks of "overseers" in the New Testament. I wonder, how many Catholics have been confronted by righteous fundamentalists shaking their NIVs and saying, "Tell me where you find bishops in the Bible!"
Very simple: "Bishop" comes to us from the Vulgar Latin biscopus (episcopus), which in turn comes to us from the Greek ἐπισκοπος (episkopos) ... "overseer". Likewise, the word "priest" comes from late Latin presbyter (classical Latin sacerdos), which was taken from the Greek πρεσβύτερος (presbyteros) ... "elder".