This elaborates the themes set out in Benjamin's previous benchmark book.
Riehl elaborates this bare suggestion into the metaphysical theory that the single basis of physical and psychical phenomena is neither bodily nor mental, nor yet space and motion.
This elaborates on the quote.
Ritz in the paper already mentioned follows in the footsteps of Riecke and elaborates the argument.
He also elaborates the episodes most attractive to his audience, notably those of Dido and Aeneas and Lavinia, the last of whom plays a far more important part than in the Aeneid.