I've had the malformed thought for a long time that any reading of the secret histories (the setting, and in-universe concept) is necessarily an interpretation. So much of the lore clicks into place when you think of occult scholars, adepts, librarians as secret historians who are themselves doing secret historiography (well, adepts are doing more... Secret Praxis? Shaping the "Secret Present," for the historians and scholars to interpret after the fact). i.e, everyone is interpreting occult events and facts of reality as if they are truly literally pliable, because they are, and because of the nature of the occult, those interpretations themselves hold occult power (consider the highest form of Secret Histories: a Port Noon Anecdote). That being said, I think there is evidence that can be drawn on to bolster certain interpretations over others, most of that being A.K's outside influences like the Apollonian/Dionysian dichotomy, mirrored somewhat in the structure of the mansus, as well as real occultists (Algernon Blackwood, William Westcott) and societies like the Hermetic order of the Golden Dawn. Also on A.K's word, there's a masterdoc somewhere with all the answers to all the conceivable questions, mainly for localisation purposes (like how the Carapace Cross "passing within" is translated; there does need to be a real answer to what that means in order for it to translate accurately), but there's probably plenty of questions that really have no answer. Who's Janus...? Go fish.