The character of Crazy Sue Dunham on page 229 is real, and lifted straight from the pages of The Berkshire Hills. She is also described in 'The Secret Integration'.
As for the Specter, it is described on page 42 of The Berkshire Hills:
'Of the stories and legends about Old Greylock, the one about the 'Specter' is most popular ... The phenomenon of a gigantic shadow of an object reflected in a cloud is so well known as to have a German name, Brockengespenst (Specter of the Brocken) from Brocken, the highest peak of the Hartz Mountains. As Greylockgespenst would be a bit unwieldy for Berkshire, here it is simply called the Specter.'
Likbez was a Russian campaign aimed at eradicating illiteracy. It took place during the 1920s and 1930s.
The campaign started on December 26, 1919, when Vladimir Lenin signed a decree which ordered that all people aged 8 to 50 were required to become literate.
The campaign was a great success. In 1917, about 60% of the population was illiterate, but this fell to 39.1% by 1926, then down to 10.3% by 1939. By the 1950s, the Soviet Union had achieved almost 100% literacy.
Today, likbez is a Russian slang term to describe an answer to a common question.
Fringe and tassels are forms of passementerie.