A short (27 page), but easily readable version of George Fox's Catechism can be found here:
Fox's Catechism (short)
A more complete (101 pages) but harder to read version can be found here:
Fox's Catechism (long, p.1-101)
Fox's Catechism (long, p. 102-147)
As the first part of the above (p.1-101) may take a long time to load, I have also broken it in to three parts, available here:
Fox's Catechism (long, p.1-35) Part 1, Fox's Catechism (long, p.36-69) Part 2, Fox's Catechism (long, p. 70-101) Part 3
However, this still may be slow to load, and it may be easier to download the pdf then to view it online.
The long version is the version used in the Concordance.