IIIde

From III (Roman numeral representing three) and thridde.

III^de

abbreviation of thridde
- 15th century, from Robert Cotton’s manuscript Faustina D. iv., “Appendix VII.”, in Brewer, John Sherren, editor, Rerum Britannicarum Medii Ævi Scriptores, or Chronicles and Memorials of Great Britain and Ireland During the Middle Ages: Monumenta Franciscana, London: Longman, Brown, Green, Longmans, and Roberts, published 1858, page 569:
  The III^de ys, that the necessite be alonly for the bretherne of the same ordre, and of none other strangers.
  (please add an English translation of this quotation)

Middle English