Sir Arthur Conan Doyle wrote 'The Adventure of the Dancing Men' here in 1903, in which Holmes cracks a code inspired by Conan Doyle's visits to The Hill House

See also...
Spudgun67 on Flickr
Tim Ellis on Flickr
Spudgun67 on Wikimedia Commons
Spudgun67 on Wikimedia Commons
chrisinplymouth on Flickr
gnomonic on Flickr
RachelH_ on Flickr
rw_norris2000 on Flickr
gnomonic on Flickr
chrisinplymouth on Flickr
gnomonic on Flickr
Dcs57 on Wikimedia Commons
Basher Eyre on Geograph
John Edward on Wikimedia Commons