A Short History of Opera - Donald Jay Grout, Donald Grout, Hermine Weigel Williams - Google Books

http://books.google.de/books?id=l_b2vIXHsUkC&pg=PA178&lpg=PA178&dq=keiser+croesus&source=bl&ots=LsrmlC9oZq&sig=_gTF26VZed2giWc-F

When first published in 1947, A Short History of Opera immediately achieved international status as a classic in the field. Now, more than five decades later, this thoroughly revised and expanded fourth edition informs and entertains opera lovers just as…