Pillar 8 contains a cipher comprised of differently sized dots (Decoded/Solved), an alphabetic railfence cipher (Solved) and a series of numbers around the bottom which probably form part of a cipher (Unsolved).
Pillar 8 is 2393mm tall and is the third tallest of the eight pillars.
The 'Bubble' area of Pillar 8 is a grid of circles of two distinct sizes (small and large). The grid is 15 rows by 52 columns. Other pillars use 26 characters so it's possible the circles are paired. However, for now, I will represent the bubbles as binary with a "1" for a large circle, and a "0" for a small circle.
The bubble code has been decoded by Bob Dovenberg who posted the solution to the Nkrypt Facebook page on 21 March 2013.
Explanation: This code is written in standard Braille. Each 2x3 box represents one Braille letter. Therefore this becomes a five line code like many of the others. Lines 2 and 4 must be read upside down.
The decoded message is:
A Short sighted general with buses to park
An old French Barber sitting quite in the dark
Tip of a finger, glide of a snail
All our great works on the head of a nail
Bob's contextual explanation: An early form of Braille was originally developed by Charles Barber to help Napoleon’s soldiers read in the dark. It was never utilized by Napoleon. I suspect lines one and two refer to this. Braille is read by the tip of one’s finger. A recent invention, called a Snail, helps people read Braille faster. The last line is bit of a puzzler. My guess is that it refers to new Braille displays that basically use nails to create readable text in Braille.
The bottom code on Pillar 8 is an alphabetic code. It begins with plaintext that is iteratively morphed into a rail fence cipher.
The railfence cipher was solved by Matthew Bienik and posted to the Nkrypt Facebook page on 26 February 2013 with the following result:
A SIMPLE CODE TO HIDE YOUR TALES
ITS LETTERS NAILED TO DIFFERENT RAILS
WITH COPPER DISCS ENCODED FAST
USED KEYS TO SHIFT THE CIPHER ON
A CABINET NOIR THEY WORKED INSIDE
The lines refer to different cipher systems, namely: Rail fence cipher, Alberti cipher disk, Trithemius's polyalphabetic cipher and the Rossignols' Great Cipher.
A string of numbers run in a circular pattern around the base of each pillar (see notes on the base code). On this pillar, it reads:
10 11 12 14 11 13 15 22 28 30 16 17 11 13 8 10 12 15 22 22 10 13 11 13 9 10 8 8 16 17