This image is of the "Staff and Students" of the Sydney University School of Architecture, 1926. I have deduced from enrolment records that the entire school (years one to four) are represented and also, that at the time, Jack was a first year student. A number of family members have independently identified Jack in the photo, as the student in the back row,third from the right (lighter jacket). Click on photo for an enlarged view.

This image is sourced from the Sydney University website. I have obtained a higher resolution image for biographical purposes, provided kindly by the University of Sydney Archives (Ref: G3_224_1269)