Friendly Witness: The Spiritual Ground of Quaker Social Action4th mo. 19, 2023 from 1pm to 6pm
Quaker Theological Discussion Group 202312th mo. 1, 2023 at 8am to 12th mo. 2, 2023 at 10am
Primitive Christianity Revived, Again
You might find the book Quaker Aesthetics, ed. by Lapsansky and Verplanck, of interest.
You could look at Amelia Mott Gummere, *The Quaker: A Study in Costume*. The author is prejudiced against plainness, so one would have to keep that in mind.
Also, see Stephen Scott, *Why Do They Dress That Way*, a more balanced treatment that covers the full range of plain Christian traditions.
You should also look at Melvin Gingerich, *Mennonite Attire Through Four Centuries*. Gingerich also has an anti-plain ax to grind, but his work is nevertheless scholarly and insightful.