The reference to the "glossa of Theotypas" is part of the fiction.
"A Handbook to the Works of Browning (6th ed.)"
Mrs. Sutherland Orr
The glossa Ordinaria, as it is called, is the best known of these commentaries.
"On Prayer and The Contemplative Life"
St. Thomas Aquinas
11, et illi faveat glossa, interli.
"Critiques and Addresses"
Thomas Henry Huxley