Mabel Addis was born in Brooklyn, New York, marking the beginning of her life journey. Specifics about her immediate family during this period are limited, but this was a crucial starting point.

Details of Mabel's early education are scarce, but during these formative years, she likely attended elementary school in Brooklyn, developing foundational skills in reading, writing, and mathematics. This period would have cultivated her early interests and learning habits.

Mabel continued her education during her late childhood and adolescence. It is presumed that she attended secondary school during this period. These years likely saw her developing more specific academic interests and perhaps her initial inclination towards writing and literature.

During the 1930s, Mabel likely pursued higher education, possibly attending college. Unfortunately, the specific college or university that she attended is unknown. This period also likely marked the beginning of her professional career, potentially in teaching or writing.