Superheroes May Never Escape Copyright. Blame Sherlock.
Briefly

"The escape of Holmes and Watson into the public domain might not be the only explanation for the coming surge, but it certainly didn't hurt."
"Edmund Wilson... conceded that he had recently been reading himself to sleep with the Sherlock Holmes series, enthralled by its 'fairy-tale poetry of hansom cabs, gloomy London lodgings, and lonely country estates.'"
Read at The Atlantic
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