Snaefallsjokull

An Icelandic mountain that Jules Verne wrote about in Journey to the Center of the Earth. Gemma remembered it being mentioned by Berglind when she was waiting for the airplane that was to take her back to Scotland.

Maes Howe

Gemma Hardy p.440

Gemma references Maes Howe in her conversation with Mr. Sinclair when on the airplane returning to Scotland. I couldn’t find a previous reference to it so I think she used it as a metaphor to symbolize all the hard work she had put in to take the exams at university.