Before we begin, I will mention:
This archive is updated after each 13 page sequence is complete.
There will be transcripts of the words in each panel below those panels.
Animated panels do not loop indefinitely. They will be tagged #watchout, and the page preceding them will have a note. This way, those who have trouble dealing with animated .gifs can be forewarned, and others can keep from missing anything.
Each page will have a link to the first panel in this archive, as well as a link to the original post on Tumblr for that page.
Questions and concerns should go to the notification tumblr, which is pageno13.tumblr.com.

The first sequence starts September 13, at 3:30 p.m. EST.