<p>21:19 <i>And when he had greeted them, he<em> related one by one the things which God had done among the Gentiles through his ministry</em></i>- Such an orderly presentation of missionary history was made with Luke present (:18 &quot;us&quot;). Surely here we have a hint as to the historical background to the book of Luke-Acts. Luke and Paul presented it as an explanation to the Jerusalem elders; hence Luke opens Volume 1 by saying that he is presenting an orderly chronological account of Gospel events. But as always, the emphasis is upon what God and His Son had done through them. This is a major theme of Luke in Acts see on 1:1- that the Lord was working through the ministries of His people. It would also explain why the focus of Acts is upon Paul when clearly there were other preachers also active. The book was initially an explanation and account to the Jerusalem elders of the work of Paul- for it was he whom they were so concerned about. Paul had no accountability to them- if at all, he would have been accountable to the Antioch ecclesia from whence he had initially departed to the mission field. But he graciously goes along with their concerns.</p>