After spending time in Corinth, Paul begins his third missionary journey (18.23), traveling on to Ephesus and, after a few other excursions, to Miletus en route to Jerusalem where he farewells the Elders from Ephesus with a beautiful, powerful and pastoral address. 

Notes (from the Catholic Parish of Lockleys in South Australia--www.lockleysparish.com) that accompanies this presentation can be found here.