Ok—here’s a call for information. M has pointed Gospels before and has sung lots of Gospels other people have pointed. Yet, she’s not terribly pleased with the spare instructions in the back of the Altar Book or with the modern variants like Grace Newark that seem to tinker with the traditional method.
So, we have the instructions from the Altar Book; we have the examples of the three tones in the Liber Usualis, but we don’t have a clear set of rules for pointing Gospels.
As an example of what I’m thinking of, the St Dunstan’s Plainsong Psalter has a clear and comprehensible set of instructions for chanting the Lessons at MP/EP in Appendix II on pp. 270-275—What’s comparable for Gospels?