I was on the floor in the upstairs hall dragging out volume 43 and it caused me to look at the collection as a whole. Two odd decisions jump out: 1) The decision to put the introduction in Volume 50, and 2) Giving a whole Volume to Two Years Before The Mast.
At first, I thought the second decision was odder, but really -- putting the introduction at the end? On the shelf where the middle-aged guy has to get down to the floor?
I guess it's a good analogy to a college education itself, where you don't figure out what you should be studying until after you're done with it.