Couple notes on the OP.
Re: the source, it's an older version of the Catholic Encyclopedia (the most recent version isn't available onlive for free). It's obviously biased, but overall it's a good source. Entries on doctrine generally give opposing views with reasonable accuracy.
Re: the twelve apostles going to outlying churches. They didn't need to. Remember, at that time, Jews from outlying areas frequently traveled to Jerusalem for festivals. I doubt it's coincidence that Jesus was crucified during the Passover, and the apostles started preaching on Pentecost. Lots of people from outlying areas were visiting during those times, so verification that the basics had been reported in Jerusalem was not as difficult as you wuld think. For instance:
Acts 2
9 Parthians and Medes and Elamites and residents of Mesopotamia, Judea and Cappadocia, Pontus and Asia, 10 Phrygia and Pamphylia, Egypt and the parts of Libya belonging to Cyrene, and visitors from Rome, 11 both Jews and proselytes, Cretans and Arabians—we hear them telling in our own tongues the mighty works of God.”
Re: the source, it's an older version of the Catholic Encyclopedia (the most recent version isn't available onlive for free). It's obviously biased, but overall it's a good source. Entries on doctrine generally give opposing views with reasonable accuracy.
Re: the twelve apostles going to outlying churches. They didn't need to. Remember, at that time, Jews from outlying areas frequently traveled to Jerusalem for festivals. I doubt it's coincidence that Jesus was crucified during the Passover, and the apostles started preaching on Pentecost. Lots of people from outlying areas were visiting during those times, so verification that the basics had been reported in Jerusalem was not as difficult as you wuld think. For instance:
Acts 2
9 Parthians and Medes and Elamites and residents of Mesopotamia, Judea and Cappadocia, Pontus and Asia, 10 Phrygia and Pamphylia, Egypt and the parts of Libya belonging to Cyrene, and visitors from Rome, 11 both Jews and proselytes, Cretans and Arabians—we hear them telling in our own tongues the mighty works of God.”