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Abigail Adams
Franklin P. Adams
Stephen Vincent Benét
John C. Bossidy
Glett Burgess
Winston Churchill
e e cummings
Clarence Darrow
Clarence Day
Arthur Guiterman
Bret Harte
Elbert Hubbard
Leigh Hunt
Ned Jordan
Don Marquis
Ogden Nash
O Henry
Thomas Paine
Ernie Pyle
Grantland Rice
Will Rogers
Alan Seeger
Paul Simon
John W Thomason
William Barret Travis
John Updike

Glett Burgess

I never saw a Purple Cow,

  I never hope to see one;

But I can tell you, anyhow,

  I'd rather see than be one.

          -Glett Burgess (The Purple Cow - 1895)

also....

Ah, Yes I wrote the "Purple Cow" ---

   I'm sorry, now, I wrote it!

But I can tell you anyhow,

   I'll kill you if you quote it.

          -(Cinq Ans Après)

Frank Glett Burgess.  1866 - 1951.  American humorist, author of Goops and How to Be Them (1900), Are You a Bromide (1906), etc.