The following entries give useful background information about Guernsey and the surrounding islands, with many of them used as devices, elements or settings in the Sarnian series. This index page acts as a glossary, with the snapshot beside each one providing a brief description that should be sufficient to understand any term within the series. For a more extensive description — and, in many cases, photos — in each instance, click the headword on each line.

AbreuvoirTraditional drinking trough for cattle
BailiwickArea of legal jurisdiction
DallianceSpeedboat used by the consortium
GuernesiaisGuernsey's native language
Hottentot FigSucculent plant that grows abundantly on headlands.
Huffin’ PuffinRemus Carey's boat, latterly Ollie's
MalkulpaGuernsey-based legal practice
Morse codeSymbolic code system
OrmerLocal seafood delicacy
Sarnia CherieGuernsey's official anthem