He was a Corresponding Fellow of the Medieval Academy of America from 1928.

"Essentially, it's for interested and knowledgeable amateurs, like the Medieval Academy."

In 1934 he was named a Fellow of the Medieval Academy of America.

The Medieval Academy of America has held its annual meetings at the Congress in 1974 and 1982.

His 1999 book won the Medieval Academy's prestigious Haskins Medal.

The Medieval Academy of America Publication no. 38.

He is also the past president of the Medieval Academy of America.

He was active in numerous learned societies, including the Medieval Academy of America, which he served as its President.

Elected fellow, Medieval Academy of America, 1996.

The Medieval Academy of America, 1932.