Thanks for the ling ... great History lesson! Putting the missionary journeys into a timeline connected with letters is good stuff for bible study. J. Vernon McGee did this with every book as he read Through The Bible on the radio.
I haven't seen that one, I'll have to look it up. My source is "The Untold Story of the New Testament" by Frank Viola. Unfortunately, I keep forgetting to say that in the videos. :-)