The Trestle Board Cat

When Hiram Abif spent time in the evenings working on the designs for the trestle board of the next day, a cat that wandered around the building often made such a noise that it distracted him. He ordered that the cat be tied up in the evening.

After his death, the cat continued to be tied up during the evening planning. When the cat eventually died, another cat was brought to the work site and tied up in the evenings. Centuries later, learned and experienced Past Masters wrote scholarly treatises about the significance of tying up a cat before planning the work of the next day.