https://marco.org/2007/12/06/kiyo-you-can-get-notes-of-any-post-by
kiyo:
You can get notes of any post by http://www.tumblr.com/dashboard/notes/{post.id} without authentication. (I don’t know if it was intended to be used) Check the notes of the post id 1. It’s an opportunity of some interesting application.
That won’t work later today. Sorry.