The last two stories appear to have been transposed as published; the opening sequence of "Knight and the Enemy" refers to Shea and Chalmers as having just come from the world of the Aeneid, which is the setting of the story following it in the collection.
The final two tales seem to be out of order in their publication; the beginning of "Knight and the Enemy" suggests that Shea and Chalmers have recently arrived from the world of Virgil's Aeneid, which is where the next tale takes place.