Anyway, my joking mentality was wrong about at least one group of visitors. In the upstairs library, there was a small case featuring Seamus Heaney's work. I eagerly eavesdropped as one elderly visitor, evidently with Oxford ties, talked about the similarities in Seamus Heaney and C.S. Lewis's careers (both Irish by birth, but then Oxford literature professors at the same college a few decades apart, and well-known writers), and then proceeded to tell the two people he was with that the next day when he was taking them to some special lunch at Oxford, that he would take them to this special room with both of their works. I had no idea there were so many hidden literature rooms at Oxford! I considered seeing if this elderly visitor's Oxford ties could get me into Oxford's English literature 650-1550 masters program, but decided they probably wouldn't appreciate sneaky eavesdroppers!
I unfortunately wasn't allowed to take photos in the Book of Kells exhibit and the photos of the Old Library did not turn out well, but even if my trip to Dublin consisted only of this stop, it would have been worth it. However, it was only 10:30 AM and I still had all day to explore.
There was an interesting American connection. Right after John F Kennedy gave his famous speech in Berlin, he flew to Dublin. In Ireland, politicians don't use podiums when giving speeches and the day before his arrival, they realized that American politicians do use podiums, so they converted a music stand into a podium for his visit, which is housed at the museum.
Another interesting story is that there was a ceasefire during the Easter Rising on St. Stephen's Green (right across from the Little Museum of Dublin), everyday so that the park's ducks could get fed!
I was not prepared for how rainy and cold Dublin was, but conveniently Primark originated in Dublin, though it is called Penney's there. So I wandered around in there for a while and found an inexpensive coat.
I also visited the National Museum of Ireland - Decorative Arts and History, which had a really interesting variety of exhibits.