I had already determined that there are 75 antiphons unique to pre-1911. Adding the 66 shared to this, there are 141 present in the pre-1911 psalter. 62 of these 75 are for separate psalms (4 are paschal or variations of alleluias not needed to be associated with specific psalms, five are "alternates" for psalm 62, and 2 are "extra" antiphons from psalm 150 since only one is needed to cover it, and 2 are “extra” from psalm 148 because there is already one for 148 which is shared with post-1911.) By addition, this means that 107 "non-repetitive"/non-seasonal antiphons are present in the pre-1911 psalter.
The question then becomes how many of these 62 pre-1911 "non-repetitive" antiphons conflict with the 130 post-1911 "per annum" antiphons. I knew a lot would conflict, but at least a few would find one of the 72 "free" spaces and therefore not be in conflict.
It turned out, when I counted, that the answer was that 15 pre-1911 antiphons are associated with a spot that is "free" in post-1911, meaning these antiphons were simply gotten rid of because the post-1911 design did not want antiphons for those spots (ie, at Prime, Terce, Sext, None, and Compline, where three psalms are under only one antiphon). So (subtracting 15 from 62) this means that 47 conflicted directly. This means the post-1911 psalter just overtly replaced these 47 even though it didn’t have to and could have used the traditional antiphon for that psalm.
Additionally, 5 that found a “free” spot actually did have a new antiphon crafted from that psalm, just drawn from a different divisi. So while it might technically have filled a different niche if we are talking about every divisi potentially having its own antiphon...in practice these 5 also amount to cases of “replacement” because an antiphon already existed, drawn from those psalms, which could have been used as the header for that psalm/group of divisi, and yet a new one was created instead (albeit a new one drawn from a different section of the psalm; usually earlier in the psalm, but in one cases later). Why this was done in these [47+5=] 52 cases is the most interesting historical question.
Subtracting 15 from 72 additionally tells us that there are 57 psalms/divisi that have never, in either psalter, had an antiphon that "belonged to" them specifically in either of the two psalters. While this is understandable for divisi meant all along to be grouped under one header, it’s a bit more surprising for the whole psalms given that there are 295 antiphons and only 150 psalms (and yet some psalms like 7 and 12 still have never had "their own" antiphon).
The Matins Versicles are more convoluted. Prior to 1911, they had an interesting arrangement. There was a unique "Per Annum" antiphon for each of the three nocturns of Matins on Sunday, and for each Feria, but then there were also special versicles for Advent, Lent, Passiontide, and Paschal. These were the same in the First Nocturn (of Sunday) and Monday and Thursday, and then another set the same in the Second Nocturn (of Sunday) and Tuesday and Friday, and then another set the same in the Third Nocturn (of Sunday) and Wednesday and Saturday. The Ferias then had additional versicles for various classes of feasts (which might remain in the Commons post-1911) that likewise were shared Monday/Thursday, Tuesday/Friday, Wednesday/Saturday: One Martyr, Several Martyrs, Martyrs during Paschaltide, Confessor Bishop, Confessor Non-Bishop, Female Saint. On Monday and Thursday there was only one versicle for Confessors (Bishops and Non-Bishops), and on Saturdays there are no versicles for these various classes possible, but only for the Blessed Virgin Mary.
After 1911, with Matins always having three Nocturns possible, changes were made. For the first two nocturns, totally new per annum and paschal versicles have been created, and these are the only two variations; there is a separate per annum versicle for each nocturn at every weekday, but the paschal versicles are the same every day. For the third nocturn (and all three Nocturns on Sunday), the Advent, Lent, and Passiontide versicle variations remain, and indeed the same as traditional (and according to the same weekday split); the traditional Paschal versicles remain here as well according the traditional weekday split, but only on days of three lessons. On days of 9 lessons, there is a third new paschal versicle (that, like those at the first and second nocturns, is the same every day). Except perhaps when called for from the Commons, the inclusion of the variations based on classes of Saints have been done away with in psalter itself.
While the change regarding the Saints makes sense to me, what is surprising and unnecessary seeming, however, is that even at the third nocturn, the traditional per annum versicles have simply been entirely replaced (except at the first nocturn of Sunday Matins). Given that the post-1911 system has space for three per annum versicles every day, and that all sorts of new ones had to be composed to enable that...it seems bizarre that they wouldn't just integrate the traditional one each day (alongside two new ones) but rather composed
three whole new ones. It would be my inclination to include the traditional per annum versicle at the third nocturn each day instead (perhaps the new ones can be integrated by splitting the year in two or putting them at some seasonal time, like making a variation for Septuagesima, though this would require creating another new versicle for the first nocturn of Sunday). The distinction between paschal days of 9 versus 3 lessons also seems unnecessary and I might be inclined to get rid of that and keep the new unvarying third-nocturn 9-lesson paschal versicle only (given that the paschal versicle doesn't vary at the other two nocturns, and that the traditional paschal versicles would still be preserved at the three nocturns of Sunday).
I
suspect all these changes to antiphons, invitatories, and versicles may have something to do with Solesmes and the manuscripts
they were using for their musicology during the chant "restoration."
I do believe that even the Pius X revisions need to be re-examined. While shortening the number of verses said at Matins (especially on Sundays) and getting rid of the repetition at the Little Hours was very necessary...I think the rigid application of these principles to the other hours was unnecessary, and led to a very untraditional weekly cycle of psalms. I have therefore made a suggestion of a "more moderate" reform of the Psalterhere.