I found these four albums at university art student's estate sale. Three heavy large albums with covers attached.
Lessons 11, 13 and 19 and 7. These were the personal school books of Mary Wallace.

The original course offered in 1948 was Illustration & Design, with Painting and Cartooning added in the 1950s. The Painting and Illustration & Design courses, which are still offered, consisted of 24 lessons, with a new lesson mailed to the student upon completion of the previous lesson. When a student completed and returned the assignment, it was critiqued by a professional artist who sent suggestions to the student.

Four books in this listing. Good condition. Will be mailed media mail

This item is sold from a vintage boutique in Seattle.