The descriptive note comes from item B0182 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:
Based upon the 2nd edition of 1891. 1st edition 1866. Morley was the drama critlc of the Examiner 1851-1866.
© Robert H. Cowden
(c) 2020. Frank Greene. All rights reserved.