“In Bonn, where I studied for a year, I changed from classical to Romance philology, taught there by its great founder, F. Diez, and at the beginning of 1852, I received the doctorate for a dissertation on the refrain in Provencal poetry.”

“In Bonn, where I studied for a year, I changed from classical to Romance philology, taught there by its great founder, F. Diez, and at the beginning of 1852, I received the doctorate for a dissertation on the refrain in Provencal poetry.”

“In Bonn, where I studied for a year, I changed from classical to Romance philology, taught there by its great founder, F. Diez, and at the beginning of 1852, I received the doctorate for a dissertation on the refrain in Provencal poetry.”