There are 10 4-cuts, 8 of them are 'singleton' cuts.

1) Events 3, 4, 5, 7 (singleton for Charlotte)
2) Evelyn, Brenda, Theresa, Charlotte (singleton, cutting out event 4)
3) Events 3 5 6 8, cutting out Francis
4) Events 8 9 10 12, cutting out Myra (Myrna is a misspelling on the graph)
7) Events 5 6 7 8, cutting Eleanor
8) Events 5 7 8 9, cutting out Ruth
9) Events 8 7 12 10, cutting out Helen
10) Events 7 8 9 12, cutting out Verne

5) Events 6 7 8 9, large cut between the two sides. This identifies the two cohesive groups, in agreement with other procedures outlined in meta-analysis
6) Events 7 8 9 and Nora, cutting two large sections (very similar to (5)