Yes, I know that at least in theory, the Quaker canon is open not closed. And I have decent sources for these
- A Quaker named Margaret Fell wanted to add the book "The Light Within" to the New Testament canon.
- Another Quaker, Robert Barclay, advocated for the inclusion of the Epistle of Matthias in the New Testament canon.
- The Letter to the Laodiceans was included in early Quaker Bibles.
What I am looking for are any additions to this list before I build a timeline.