writing differences that I noticed

[oshfdk]

I do not really know how to provide the proof of what I am talking about, but if you look at the High res of image id:1006091, you will notice that on the second line near the right side of the page, the writing starts off faint, and slowly gets darker then fades again. The only way that would logically be possible is if it is actually a key to a cypher of some kind, or a way to identify the lines themselves. Also, only certain letters/symbols are darkened. I am no expert, but that seems like the darkened symbols/letters are intentional.

I'm not sure which piece you are talking about. Could you maybe use some of the tools mentioned in this thread to show us: You are not allowed to view links. Register or Login to view.

Generally ink would gradually get fainter between the refills of the quill. Also, it's possible that dark ink is intentional, I think this has been discussed before.

The only way that would logically be possible

I'd say that the complex relationships of the quill, the ink and the style of writing can produce all sorts of strange behavior, so certainly there is more than one logical possibility.