(This page under heavy construction. Smack me if you see any mistakes.)

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There are a billion ways to solve Part 3. Who knows the exact 
matrix? only WW...     (and J Sanborn)

I've put this table here again just for reference.

My first task is to break up 336 into all the even row/column combinations I can. I'll 
work on irregular ones later.

You can see the row and column numbers become reversed after a certain point. 

ENDYAHROHNLSRHEO

00011 01000 000000 

6 8 ??

DUNNO ABOUT THESE BINARY NUMBERS, THERE ARE SEVERAL 
WAYS THEY CAN BE INTERPRETED 



character count without ? is 336 and that's what i'm using.

ENDYAHROHNLSRHEOCPTEOIBIDYSHNAIA
CHTNREYULDSLLSLLNOHSNOSMRWXMNE
TPRNGATIHNRARPESLNNELEBLPIIACAE
WMTWNDITEENRAHCTENEUDRETNHAEOE
TFOLSEDTIWENHAEIOYTEYQHEENCTAYCR
EIFTBRSPAMHHEWENATAMATEGYEERLB
TEEFOASFIOTUETUAEOTOARMAEERTNRTI
BSEDDNIAAHTTMSTEWPIEROAGRIEWFEB
AECTDDHILCEIHSITEGOEAOSDDRYDLORIT
RKLMLEHAGTDHARDPNEOHMGFMFEUHE
ECDMRIPFEIMEHNLSSTTRTVDOHW?

(The red letters are the start of the plaintext and the blue L is the
second "L" to avoid confusion.)

Doesn't look like much until you rearrange the ciphertext as even 
row/column blocks starting with the lowest columns from the table
first and working my way up.

You can see the different patterns that emerge when you transform
the text this way in the following examples:

16 X 21 block
-------------

ENDYAHROHNLSRHEO
CPTEOIBIDYSHNAIA
CHTNREYULDSLLSLL
NOHSNOSMRWXMNETP
RNGATIHNRARPESLN
NELEBLPIIACAEWMT
WNDITEENRAHCTENE
UDRETNHAEOETFOLS
EDTIWENHAEIOYTEY
QHEENCTAYCREIFTB
RSPAMHHEWENATAMA
TEGYEERLBTEEFOAS
FIOTUETUAEOTOARM
AEERTNRTIBSEDDNI
AAHTTMSTEWPIEROA
GRIEWFEBAECTDDHI
LCEIHSITEGOEAOSD
DRYDLORITRKLMLEH
AGTDHARDPNEOHMGF
MFEUHEECDMRIPFEI
MEHNLSSTTRTVDOHW?

Yes it looks very similar to Elonka's method doesn't it? This wasn't 
intentional to duplicate her efforts, but before I started doing anything
to the ciphertext I had colored the first 6 letters of the plaintext so
I could see how they moved in relation to one another as I rearranged the 
text. Elonka was on the right track when she came up with that method, and
may have found the original matrix without even being aware of it. 

21 X 16 block
-------------

ENDYAHROHNLSRHEOCPTEO
IBIDYSHNAIACHTNREYULD
SLLSLLNOHSNOSMRWXMNET
PRNGATIHNRARPESLNNELE
BLPIIACAEWMTWNDITEENR
AHCTENEUDRETNHAEOETFO
LSEDTIWENHAEIOYTEYQHE
ENCTAYCREIFTBRSPAMHHE
WENATAMATEGYEERLBTEEF
OASFIOTUETUAEOTOARMAE
ERTNRTIBSEDDNIAAHTTMS
TEWPIEROAGRIEWFEBAECT
DDHILCEIHSITEGOEAOSDD
RYDLORITRKLMLEHAGTDHA
RDPNEOHMGFMFEUHEECDMR
IPFEIMEHNLSSTTRTVDOHW?

24 X 14 block
-------------

ENDYAHROHNLSRHEOCPTEOIBI
DYSHNAIACHTNREYULDSLLSLL
NOHSNOSMRWXMNETPRNGATIHN
RARPESLNNELEBLPIIACAEWMT
WNDITEENRAHCTENEUDRETNHA
EOETFOLSEDTIWENHAEIOYTEY
QHEENCTAYCREIFTBRSPAMHHE
WENATAMATEGYEERLBTEEFOAS
FIOTUETUAEOTOARMAEERTNRT
IBSEDDNIAAHTTMSTEWPIEROA
GRIEWFEBAECTDDHILCEIHSIT
EGOEAOSDDRYDLORITRKLMLEH
AGTDHARDPNEOHMGFMFEUHEEC
DMRIPFEIMEHNLSSTTRTVDOHW?

28 X 12 block
-------------

ENDYAHROHNLSRHEOCPTEOIBIDYSH
NAIACHTNREYULDSLLSLLNOHSNOSM
RWXMNETPRNGATIHNRARPESLNNELE
BLPIIACAEWMTWNDITEENRAHCTENE
UDRETNHAEOETFOLSEDTIWENHAEIO
YTEYQHEENCTAYCREIFTBRSPAMHHE
WENATAMATEGYEERLBTEEFOASFIOT
UETUAEOTOARMAEERTNRTIBSEDDNI
AAHTTMSTEWPIEROAGRIEWFEBAECT
DDHILCEIHSITEGOEAOSDDRYDLORI
TRKLMLEHAGTDHARDPNEOHMGFMFEU
HEECDMRIPFEIMEHNLSSTTRTVDOHW?

42 X 8 block
------------

ENDYAHROHNLSRHEOCPTEOIBIDYSHNAIACHTNREYULD
SLLSLLNOHSNOSMRWXMNETPRNGATIHNRARPESLNNELE
BLPIIACAEWMTWNDITEENRAHCTENEUDRETNHAEOETFO
LSEDTIWENHAEIOYTEYQHEENCTAYCREIFTBRSPAMHHE
WENATAMATEGYEERLBTEEFOASFIOTUETUAEOTOARMAE
ERTNRTIBSEDDNIAAHTTMSTEWPIEROAGRIEWFEBAECT
DDHILCEIHSITEGOEAOSDDRYDLORITRKLMLEHAGTDHA
RDPNEOHMGFMFEUHEECDMRIPFEIMEHNLSSTTRTVDOHW?

48 X 7 block (Elonka's rendition)
------------

ENDYAHROHNLSRHEOCPTEOIBIDYSHNAIACHTNREYULDSLLSLL
NOHSNOSMRWXMNETPRNGATIHNRARPESLNNELEBLPIIACAEWMT
WNDITEENRAHCTENEUDRETNHAEOETFOLSEDTIWENHAEIOYTEY
QHEENCTAYCREIFTBRSPAMHHEWENATAMATEGYEERLBTEEFOAS
FIOTUETUAEOTOARMAEERTNRTIBSEDDNIAAHTTMSTEWPIEROA
GRIEWFEBAECTDDHILCEIHSITEGOEAOSDDRYDLORITRKLMLEH
AGTDHARDPNEOHMGFMFEUHEECDMRIPFEIMEHNLSSTTRTVDOHW?

Elonka says to start at the S (ID BY ROW S) and then count every 4
characters backwards to get the solution. This works great, but then,
if you can go every so many characters to get the next plaintext letter,
why not just stack the letters 4 characters at a time and make your 
life easier?? In fact, since the first letter in the right hand corner
is always the same distance from the S as the letters between each
plaintext letter is, you can just start there... 

Here we go...

TAKE THE "L" (MAYBE THAT'S WHAT THAT WEIRD "L" ON THE TABLE SIDE IS HINTING AT)
IN THE UPPER RIGHT HAND CORNER AND START TYPING DOWN. AFTER YOU TYPE THE 4TH
CHARACTER, START A NEW COLUMN.

  LAMETOFLICKERBUTPRESENTLYDETAILSOFT
  THEHOLEALITTLEIINSERTEDTHECANDLEAND
  YWASREMOVEDWITHTREMBLINGHANDSIMADEA
  SLOWLYDESPARATLYSLOWLYTHEREMAINSOFP.....

SOLVING PART 3 REALLY WAS JUST A SIMPLE 2 STEP PROCESS. IN FACT, 
YOU CAN TAKE ANY EVEN ROW/COLUMN COMBINATION AND DO THE SAME
THING, WHICH MAKES ALOT OF DIFFERENT SOLUTIONS. IM STILL LOOKING 
FOR AN EASIER METHOD, BUT THIS IS PROBABLY AS SIMPLE AS IT'S 
GONNA GET.FURTHERMORE, THIS METHOD DOESN'T REQUIRE ANY KEY, 
JUST ALOT OF GUESSWORK.