Lindsay Ellis Alladin vs. The thief and the Cobbler video (in relation to a discussion about orientalism)
The chronological error in chapter 22, noted by @fdelopera - Daroga asks Erik about the chandelier before Chritine een see Erik's face, let alon is kidnapped (which should happend for the first time right after the chandelier fall)
Notes from the different bookclub for chapters 22, 23 and 24 (this lasy one has an exellent model of Erik's room!)
Erik jokingly referring to his lake as the lake Avernus in Italy - reference to the entrance to the Underworld as per writers such as Vergil and Homer (this painting is by J. M. W. Turner)
The 'you great booby!' sentence and it's different translations from @paperandsong (it's still'great booby' for me, no matter what Coward says)
Kyrie eleison is the start of a Roman catholic mass, and is in Greek - apparently, because Rome was essentially bilingual until 3-4th century AD, with most common filk (who formed the main audience of the church) speaking common Greek
The Hong Hoa Tham, the De Tham that Erik claims to have taught to se the reed breathing trick along with his trop of men, and which had helped them escape the authorities supposedly, - is actually a Viietnamese leader of revolutinary resistance who fought against the French occupation, and is currently viewed as a national hero i Vietnam (thank you Ribiere notes once again).
The beauty and the beast fairytale had been written in 1740 by Gabrielle-Suzanne Barbot de Villeneuve , so Daroga might be referring to the actual fairytale
The difficulty of translating the 'genie' part of the 'I am not an angel nor a genie nor a ghost...I am Erik!' was discussed by WIll
I had not known thet Harry Houdini took his name in honour of Jean-Eugène Robert-Houdin - very cool
The torture chamber post from Alex! And another one!
as @englishmajorloser noted, the continuous poking by erik about the people with noses and how they fall into his torture chamber
How wet Erik is all the time!
Also, on reading @or-what-you-will's discussions of the translations - I hadn't even known what will-o'-the-wisp was, - both a ghostly, flickering light seen over the bogs, and a metaphore for the unatteinable (from chapter 1 I think) (painting by Hermann Hendrich).
And also an addition to the astrakhan cap discussion from the previous post