Lyrical: Through the Alimentary Canal with Gun Camera

In High School, my I favorite Algonquin Round Table author was Robert Benchley, for his sophomoric and digressive writing style. (I suppose you, like most people with better taste, chose Dorothy Parker, Noel Coward, or Harpo Marx)

Anyway, I always thought Benchley was the author of

Through the alimentary canal with gun and camera:
A fascinating trip to the interior, 
Hardcover – 1930

But it turns out Benchley only wrote the introduction.

Nevertheless, the book clearly anticipated the modern endoscopy and other-endoscopy.