They're on display in a case, easy to miss, near the replica Rosetta stone that you can touch ( https://g.co/arts/Jc9fSG2q4FfZzCPT9 )
I love these artifacts because they show a real live example of the way people did science a few centuries ago.
The pace is thought-provoking -- it took 4+ years between one person's letter and another's results? we didn't even declare the translation "done" until 1824? -- and I've always wondered what was going on there.
This is an interesting book review, helps fill in some gaps for me!
I am a little surprised to see the author use the phrase "Elgin Marbles". This was used ubiquitously a few years back but at some point in the past 5-10 years the preferred phrase seems to have become "The Parthenon Sculptures" (see e.g. https://www.britishmuseum.org/about-us/british-museum-story/...). I'm not quite sure when this happened and when I looked it up recently I couldn't find good news coverage explaining the conscious choice to change the name.