I am also indebted to Mr. F. R. Cornaz, Mr. Sabatier-d'Espeyran
of Lausanne, and Baroness Pauline de Selys-Longchamps of Brussels
for making available to me certain examples of the Art Nouveau, as
well as accounts and impressions of the period.

Mme. Hector Guimard, now residing in New York, has also been
most helpful and has placed at my disposal many photographs, designs,
critiques, and actual examples of her late husband's work.

For suggestions regarding the text, I should like to express my
appreciation to Mr. W. Scott Corbett of New York, and Mr. Chapin
Leinbach of Washington, D. C. Mr. Leinbach contributed much infor-
mation concerning the literary background of the Art Nouveau.

And I especially wish to thank Mr. Malcolm Merritt Jr. of New York
for his sincere and painstaking literary revision of portions of the text.

I am very grateful to Mr. Herman Landmann of The Hague for his
sustained interest in furthering the publication of this book, and
particularly for his jacket and cover design, conceived in a spirit
appropriate to the subject.

The staff of the Museum of Modern Art's library and photographic
departments, and the personnel of the New York Public Library, the
library of the Musée des Arts Décoratifs in Paris, and the University
libraries of Lausanne, Geneva and Brussels have all been most cooper-
ative. Without their help this book could not have been completed.

Lausanne, Switzerland HENRY F. LENNING

September 1951