Posted by Adam Quinan on February 12, 2018 at 12:37:15 user Adam.
In Reply to: Hawaii Five-O and Nancy posted by Alex Forbes on February 12, 2018 at 09:22:41:
I assumed that Ransome got the basic idea from the Sherlock Holmes adventure and made it into semaphore rather than the secret signs used by Conan Doyle so that people could actually try and read it themselves. He even provided semaphore lessons and pictures earlier in Winter Holiday to show how it was done.
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