After 21 years as head of Pennsylvania 's graduate school , Ames resigned his post in 1928 .
After 21 years as head of Pennsylvania 's graduate school , Ames was succeeded by the classicist H. Lamar Crosby .
After 21 years as head of Pennsylvania 's graduate school , Ames resigned his post in 1928 and was succeeded by the classicist H. Lamar Crosby .