Pullman himself has acknowledged many sources and influences upon his work from Greek mythology, the Bible, and classical literature to a Finnish telephone directory.
The ‘Dark Materials’ are the four elements out of which God created the universe, while Pullman’s title presumably alludes to the rich potential not only of these materials but also of the ‘Dust’ that is so significant to his theme.
Jon Morrell talks about the period influence on Costume Design and you can see the fashion influences on the
witches costumes. Set designer
Giles Cadle explains how period references were accomodated in the initial set design.