In the Lion House, Brigham Young’s large family developed a system for keeping track of everyone at night. Each person who went out for the evening would place his or her own lamp on a table in the hall near the front door. When returning, each family member retrieved the lamp and took it to his or her own room. Whoever had the last lamp left on the table was responsible to lock the door for the night.
Edith Young Booth, “Recollections of the Lion House,” Relief Society Magazine, vol. 24, no. 7 (July 1937), 428