[Rapscallion]

Okay, I've been trying to decode those Vigenere-looking jumbles. In the one where they are divided into separate words, one of the words (in the code) is 'n'.
The only one-letter words in english are 'I' and 'a'.
This means somewhere in the keyword is the letter 'f' (if the word is I) or 'n' (if the word is A).

Sorry this doesnt help very much, but now you know keywords without an n OR an f are definitely wrong (if the message is english, which it looks like it is).


Edit: did a bit more work narrowing this down.
If that 'n' is really the word 'a' or 'I', then I found the location of the 'n' or 'f' in the keyword. Since the 'n word' is 48 characters in, and the cooresponding keyword letter has to overlap, then the keyword's 48th letter is n/f.

Now, the keyword could be a short word that repeats for the length of the message. In that case, the 3rd, 6th, 12th, or 24th letter would have to be f or n. That should narrow it down considerably!