The excavations at Serabit and the non-Egyptian character of the ancient hill sanctuary supplied new material for reflection.
Romanus François Butin of Catholic University of America published articles in the Harvard Theological Review based on the 1927 Harvard Mission to Serabit and the 1930 Harvard-Catholic University Joint Expedition.
In 1932, he wrote: The present article was begun with the limited purpose of making known the new inscriptions discovered by the Harvard-Catholic University Joint Expedition to Serabit in the spring of 1930.
In the course of this study, I perceived that some signs doubtful in the inscriptions already published were made clear by the new slabs, and I decided to go over the entire field again.
Future scholars continued this numbering scheme for ease of reference.