Mr. Robinson,

We do have a copy of the index which lists "contributing authors."
Unfortunately there are too many for me to list in their entirety--but
here's a sample.
Edwin A. Abbott
Mrs. A. H. Alexander
Grant Allen
Mrs. Amelia E. Barr
Augustine Birrell
H. H. Boyesen
John Bright
Phillips Brooks
Robert Browning
James Bruce
George Washington Cable
Will Carelton
Robert Collyer
Mrs. Rose Terry Cooke
G. W. Curtis
Lady Dilke
Edward Eggleston
Edgar Fawcett
Percy Fitzgerald
J. A. Froude
W. S. Gilbert
Edmund Gosse
H. Rider Haggard
E. E. Hale
Thomas Hardy
Bret Harte
Julian Hawthorne
Thomas Wentworth Higginson
Oliver Wendell Holmes
William Dean Howells
Tom Hughes
T. H Huxley
Henry James
Sarah Orne Jewett
T. W. Knox
Andrew Langd
George Parsons Lathrop
W. E. H. Lecky
George Macdonald
Brander Matthews
George Meredith
Mrs. Chandler Moulton
F. Parkman
Walter Pater
Coventry Patmore
Elizabeth Stuart Phelps
Christina Rossetti
E. C. Stedman
Leslie Stephne
Frank H. Stockton
J. A. Symonds
Lew Wallace
Charles Dudley Warner
Edmund Yates