... that I have been away for a few days visiting dear friends in the Orkneys; which I will say more about soon. My apologies to those who were puzzled not to see their comments appearing on threads. I have now raced through and enabled most of them. I am also sorry if my finger slipped and some worthy contributions were accidentally consigned to oblivion. Those who enjoy reading threads will have a lot to read.
One quick point about sources, which I am moved to offer because some of those who seem quite sure that the Roman Canon once had an epiclesis quote Fortescue and the Catholic Encyclopedia at me. These are manuals which go back to the beginning of the twentieth century and do no represent the scholarship of the latter part of that century. For the mid-century, try Jungmann The Mass of the Roman Rite, still indispensible as a source of information and references, and Dix Shape of the Liturgy through their indexes. More recently, Paul Bradshaw has made a thing of declining to accept universal common patterns in early liturgies at all.