Donald Cochran was a Pennsylvania Architect born in 1897. These are examples of student figure drawings from 1920 and 1921 generally.
He attended the University of Pennsylvania School of Architecture. He graduated in 1921 after a break in his studies when he served in the U.S. Navy in World War I. These drawings must have been from an art class during his last two years.
These drawings are on sale on on Ebay.com.
For another look at figure drawing in schools in the early twentieth century see How to Draw the Human Figure - The Figure Drawings of Grace A. Young.
Lessons on Figure Drawing (Dover Books on Art Instruction)
Anatomy and Perspective: The Fundamentals of Figure Drawing (Dover Books on Art Instruction, Anatomy)
How To Draw The Human Figure: The Drawings Of Grace Young
View Sample pages at Google Books.