Premise: The Lectures of the Three Degrees in Craft Masonry are a series of manuals on Freemasonry that are arranged in the form of catechisms to be memorized. They cover rituals and symbolism associated with the three degrees of Craft Freemasonry in question and answer form. During the second half, the Lectures gradually ceased to be used regularly in English Lodges.
Hypothesis: The Lectures were used only in English Lodges.