Just a quick update as a result of the preliminary work for Deck 8.
The Herbarium from "Is There in Truth No Beauty?" should go to the center of Deck 5 assuming it is still connected to the "Life Sciences Department Botanical Section" featured in "The Man Trap".
Simply put the "back door
" leads straight to the rectangular passage
briefly seen in TB and to the circular Herbarium (apparently Kirk wanted to take Dr. Jones to the more exotic plants).
I should also add that Matt Jefferies envisioned the circular Herbarium room to connect to a more rectangular section containing the carnivorous plants.
Also, the corridor outside
has the same properties as in the Deck 5 scene with the Section 3 security report (i.e. extra door between briefing room and cabin set, "Astro-Medicine Ward 4" door sign on briefing room set).
The major reason the botanical section cannot possibly be on Deck 8 comes from this shot
in "The Man Trap". As discussed earlier, Deck 8 is way to narrow to accomodate such a long corridor.
As a result, Uhura's cabin will be on Deck 5 (vis-a-vis another botanical section of the life sciences department) and the central overhead support beams of both the Herbarium (Deck 5) and the "Solarium" / Season 3 Rec Room (Deck 8) can be conveniently accomodated in the center of the saucer.