It would be interesting to have hard evidence, modern and premodern, for the Consecration of Chrism by prelates not in episcopal orders. For example, within the jurisdiction of an Abbas nullius where does the Chrism come from? This is interesting because Chrism Masses have become very much part of the heart of ecclesial life in PEV-land.
BTW, a correspondent criticises Anglican Catholic bishops for not always nowadays wearing buskins, gloves, slippers, and all the rest. This reminds me of the action of the great Bishop Kirk of Oxford, who left all his very Counter-Reformation pontificalia to any priest married to a daughter of his who should become a bishop. So they devolved AD REVERENDISSIMUM IN CHRISTO PATREM AC DOMINUM ERICUM WALDRAMNUM KEMP EPISCOPUM CICESTRENSEM SOCIETATIS DEIPARAE VIRGINIS ET DIVI NICOLAI VISITATOREM ECCLESIAE CARNOTENSIS CANONICUM, as I recall I used to write him up in the Lancing Register on the occasion of his visits (I wonder if the Lancing Chapel registers are still done in Latin; so often things go to pot when one retires ...). I presume he still has it all.
Not that that exhausts the Kemp wardrobe. Was he the first C of E diocesan to use modern RC choir dress?
The front cover of the Diocesan Magazine sometimes showed lovely pictures of him pontifically clad in Chartres Cathedral (with which diocese we were twinned) wearing their best (Empress Eugenie) cloth of gold set.
Ah, Patrimony, Patrimony.
But perhaps, if the Ap Con really delivers, French Cathedrals may in a few years time be choc a bloc with exPEVs in the guise of Ordinaries singing Pontifical High Mass in the Extraordinary Form of the Roman Rite.
You think I'm joking?