Once you have the button and Nancy has commented on the dates in Franklin's memorial, you're ready to tackle the door. Click on the panel on the locked door and put the 6 button in place --
Hint 6
-- and nothing happens. Darn! Well, the buttons can be moved; maybe we need to put them in some specific order.
Hint 7
And that's where the note about Franklin's memorial comes into play. Read on.