Where Does the Santiago Staff Begin?

This article started with the discovery that sign 11 was preceded by sign 76 on the Santiago Staff in 28 occurrences out of 35, and that this digraph, 76-11, occurred only on lines I, 2, 3, 4, 12, 13, and 14. The Staff bearing 14 lines, this suggested that these seven lines constituted a continuous text starting on line 12. Searching for corroborating evidence led to unexpected, and disturbing, observations.