Quaker epistle: in the 17th century, the Quaker movement revived the Gospel use of the word "epistle" to mean an advisory or admonitory letter, sent to a group of people, sometimes termed a "general epistle". The text of a short epistle, written by Isaac Penington in 1667 is in Wikisource.
- For examples of the titles of these 17th-century Quaker epistles, search on "epistle" in the catalogue Archived 2009-05-12 at the Wayback Machine of the Religious Society of Friends Library, London.
- "links to Britain Yearly Meeting Epistle sent in 2012 (.pdf)" (PDF). Archived from the original (PDF) on 2016-03-04. Retrieved 2012-08-03.
- Epistles received by Britain Yearly Meeting from other Yearly Meetings, printed as part of Documents in Advance of Yearly Meeting 2009 Archived 2011-07-26 at the Wayback Machine - pdf file.
- Blog of Epistles received by The Friend (Quaker magazine).
- "To Friends everywhere" : reflections on the epistle in the life of London Yearly Meeting" by Edward H. Milligan. - In: The Friends' quarterly ; Vol.22 ; no.11 (July 1982 ) p. 724-736.
- "Epistles in context: London Yearly Meeting in the nineteenth century" by Peggy Heeks - In Friends quarterly; Vol. 40; No. 3 (August 2012) pp. 12–23.
- "Written epistles of London Yearly Meeting in the eighteenth century" by David J. Hall in A Quaker miscellany for Edward H. Milligan, edited by David Blamires, Jeremy Greenwood and Alex Kerr, published by David Blamires (1985) ISBN 0-9510152-1-4. pp. 91 – 99.