Arellius Fuscus’ extensive description of the Tarpeian Rock has a romantic flair that hearkens back to his reputation, as noted by Seneca (Suas. 2.10), for delivering poetic declamations. He frequently imitated the language of Virgil, and this passage has previously been likened to an epic description of the Underworld (Bradley, 111).
I really like the way that your notes are bringing out the importance of the Rock and its descriptions throughout the declamation.