A week or so ago Professor John Scattergood, the Pro-Chancellor of the University (yes, dear hearts, The University of Dublin has and does exist with but one constituent college…) produced a memo on the arms for the Fellows of Trinity College. That memo is, with his permission, available here : Arms and Trinity.
Dr Scattergood, in an email to me, stresses “It is very incomplete (I had to write it in three days from what materials were immediately available)”. Thus it should be read in that light. It is, I understand, incomplete in some details but NOT in overall thrust. The document is well worth reading.