This room holds the whole deck that conquered the world: the seventy-eight cards Arthur Edward Waite commissioned and Pamela Colman Smith painted in 1909, the first deck to give every minor card a full painted scene. Each card here carries Waite's own 1911 description and divinatory meanings, quoted from The Pictorial Key to the Tarot with his punctuation kept, and beside them the library's note on what the card contributes to the deck's grammar.
Read it the way you would read a glossary of any symbolic language: twenty-two trumps forming the deck's mythic spine, and four suits of fourteen running ace to ten and then through page, knight, queen, and king. Waite made choices worth noticing as you go. He swapped Strength and Justice against the older decks, left the Fool unnumbered at the threshold, and wrote about his own divinatory tables with visible unease. The architecture, the history, and the honest questions live in the Atlas entry on the tarot; this room is where you meet the cards themselves.
One vow, restated at the door: the library studies the systems and never performs them. No card here will be drawn for you, and none knows your future. The plates themselves are not yet hung in this room; until they are, Waite's descriptions stand where the pictures will go, and they are very good pictures in words.