During the first half of the 20th century, a now relatively unknown comic book detective, Sexton Blake was a very popular fictional character. Blake (who was modeled on Sherlock Holmes) ran until 1978 in different comic books, radio shows and movies.
In one printed episode: New series · Issue 988 · 16/9/1922 by Amalgamated Press, Blake goes off to Patagonia in "SEXTON BLAKE IN SOUTH AMERICA". The illustration below is from its cover (Fred Bennet) and in this story, which takes place in Patagonia, Sexton with Sir Richard Losely and Lobangu hunt the Plesiosaur at laguna Negra.
This goes to show the media coverage that the "plesiosaur incident" got back in 1922. The image is quite interesting, Blake is shooting at the monster which is quite unlike a plesiosaur, and is emerging from a very "tropical" lake (not at all like the temperate Andean forest setting of the real lake).
Patagonian Monsters - Cryptozoology, Myths & legends in Patagonia2011 International Year of Forests Copyright 2009-2011 by Austin Whittall ©