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If this is from a printed sample, the name of the source would be helpful.
If it's from the web, the URL would be helpful as well.
It's from a printed book about the architect Paul Williams, not from the web.
The hardcover printed book is called "Paul R. Williams: Classic Hollywood Style," by Karen E. Hudson, published by Rizzoli.
It must be Whitney Light by Hoefler&Co 
Is this the 1993 monograph, or the 2012 Hollywood style book? The date helps us narrow our search....
It's the 2012 Hollywood Style book.
And Fivos has given you your answer....
Thank you so much! Had never heard of it before.