Another major influence is Fridtjof Nansen's books about his crossing of Greenland in 1888 and his Arctic expedition from 1893 to 1896 in the Fram and by sledge, which are extensively referenced in the novel.

Whilst observing the stars from an isolated barn, Dick and Dorothea encounter the other children and soon become firm friends.

The holiday is extended when leader Nancy Blackett catches mumps and the group is quarantined and cannot return to their boarding schools.

Initially, while waiting for snow to fall, the children embark on a series of adventures ranging from rebuilding an igloo to building an ice sled.

Dick displays heroism by rescuing a sheep belonging to Farmer Dixon stranded on an ice-covered ledge, thus gaining his gratitude and earning them a sledge of their own.