The descriptive note comes from item B0248 in :
Cowden, Robert H.
Concert and opera singers
A bibliography of biographical materials
Compiled by Robert H. Cowden
Westport, Connecticut: Greenwood Press, c1985, 278 p.
This is what Robert H. Cowden had to say:
This particular set is based upon the revised edition of 1932. are de rigueur for connoiseurs of witty, intelligent, and penetrating criticism.
© Robert H. Cowden
(c) 2013. Frank Greene. All rights reserved.