So I have a Content Item, specifically this Wordage and it shows up in my Correspondant's tab and also in the Wordage Controller where I am editing it now.  It is represented in the database by the Wordage object; it has a timestamp and belongs to a particular user.  Now the challenge is to put it in a Container and view it on a Page or in a Document.  I have created a Container, Container #1 and entered this Wordage as a ContainerItem as being contained by Container 1.  It seems logical that the ContainerController would allow me to view what Items are contained by each Container and to modify them.  Then it should be possible to create a Page, enter the Container into a PageContainer object, and display the Page in the PageController: I should start there.