Anyways. In Contracrostipunctus, the first letter of each line of dialog can be made into a sentence:
"Hofstadter's Contracrostipunctus acrostic" all backwards spells J. S. Bach.
there's also an extra "Y" that seems spurious between 'all' and 'backwards.' For one, something leads me to believe that the "Y" is not really spurious.
Also, I'm not sure how to get something or other to be spelled backwards to give J. S. Bach. That name spelled backwards is: hcab sj. I've even tried replacing the H with a B, to no avail. I think I'm on the right track, because the tortoise talks about playing the notes BACH backwards and upside-down, so I'm assuming I should be looking at the above sentence backwards somehow.
hcab sj or similar patterns don't show up in Hofstader, Contracrostipunctus, acrostic, "goblet g" or much of anything else. The best I've gotten is that "Hofstadter's Contracrostipunctus acrostic" is HCA ..., but the next letter is the 'A' in 'all', and then that weird, spurious Y.
Frankly, I'm stumped.