others it contains this poem inspired by, and dedicated to, the work of Mary Kingsley –
ADDENDUM: The Tempest Prognosticator or Leech barometer was 'invented' by George Merryweather in 1851. It was a contraption in which leeches were kept in small bottles. When a storm was approaching the leeches would become agitated, attempting to escape from the glass containers and setting off little bells - the greater the tinkling sounds, the greater the risk of a storm.
For a related post: THE ENDURING INFLUENCE OF ROBERT LOUIS STEVENSON