He then started to work under the tutelage of Dr. Joseph K. Swift, a graduate of the University of Pennsylvania. Swift realized quickly that Gross' rudimentary education was insufficient training for work as a doctor. Gross then returned to preparatory school, first attending Wilkes-Barre Academy.
Dr. Joseph K. Swift, a University of Pennsylvania alumnus, observed that Gross' education was insufficient for medical practice. Consequently, Gross returned to preparatory school and attended Wilkes-Barre Academy initially.