Through the thoughtfulness of William J. Henderson I was asked to supply material for The Complete Opera Book, which was missing at the time of Mr. KobbÉ's death.

In performing my share of the work it has been my endeavor to confine myself to facts, rather than to intrude with personal opinions upon a work which should stand as a monument to Mr. KobbÉ's musical knowledge and convictions.

Katharine Wright.

New York, 1919.