Took the tour. The docent was enthusiastic and knowledgeable. The third floor, stuffed with first editions was the highlight of our time there. Another item of note was a vellum proclamation from Charles the Second on the first floor. One of the items in that declaration was that women's parts in plays should be performed by women instead of boys, neat! We'll be back!
A hidden gem, and worth a trip if you appreciate literature and the written word. Also got to see the Maurice Sendak _Where the Wild Things Are_ exhibit, with early sketches and drafts, and a standout in the regular collection is the first edition of _Alice Adventures in Wonderland_ by Lewis Carroll.