A Helio or Heliograph is a device for transmitting messages by reflecting sunlight with mirrors.
Eldred Jonas is surprised to find that Roland, Alain and Cuthbert use pidgeons instead of a helio.
A Helio or Heliograph is a device for transmitting messages by reflecting sunlight with mirrors.
Eldred Jonas is surprised to find that Roland, Alain and Cuthbert use pidgeons instead of a helio.