Can we draw the following hypothesis from the context? 

Context:

Murder in the Submarine Zone (also published as "Nine—And Death Makes Ten" and "Murder in the Atlantic") is a mystery novel by the American writer John Dickson Carr (1906–1977), who published it under the name of Carter Dickson. It is a whodunnit and features the series detective Sir Henry Merrivale.

Hypothesis: Murder in the Submarine Zone was published in nineteen hundred fifty six.
It's impossible to say