Summarize the conversation that Alan has with Ebenezer

Are you referring to chapter 29? 

yes 

Alan demanded to know what Ebenezer had paid Hoseason, thereby revealing that he knew about the kidnapping. Alan told him that he and Hoseason were partners. Ebenezer inquired what Hoseason had told Alan. When Alan declined to answer, Ebenezer said that Hoseason was a liar and that he had only paid him twenty pounds because Hoseason would have made more when he sold David in the Carolinas.