Page 426. " and refused to let anyone in who didn't know the words to 'Sugar Magnolia' "

'Sugar Magnolia' is a song by the Grateful Dead. (See bookmark to page. 220, "The Grateful Dead. Good Lord.") The song first appeared on the 1970 album American Beauty, and became the second most performed song at Grateful Dead concerts.

Listen to Sugar Magnolia on Spotify.

In case you ever require access to a bomb shelter populated by Grateful Dead fans, you can study the lyrics here.

Page 427. " I believe that the mandala actually has quite a respectable place in the history of Theravada "

 A mandala is an ancient religious art form consisting of a circle containing symbolic patterns and forms. Mandalas are found in both Buddhism and Hinduism as an aid to prayer and meditation. Mandalas are present in the Pali Canon, the earliest surviving Theravadic Buddhist scriptures, which seems to confirm Henry's point.

Page 429. " a penchant for Mary Tyler Moore mannerisms "

Mary Tyler Moore is an American television actress, best known for appearing in The Dick Van Dyck show, The Mary Tyler Moore Show and the film Ordinary People. She was born in Brooklyn, New York, in 1936.

Page 441. " The Upanishads "

The Upanishads
Public DomainThe Upanishads
 The Upanishads are one of the main philosophical texts of Hinduism. Many of these works were composed in Sanskrit between around 800-400 B.C.; newer Upanishads were composed in Medieval times. New discoveries of lost works are still being discovered. As a result there are more than two hundred recognised Upanishads. The works discuss the importance of Brahman and Atman: the Universal Spirit and the Individual Self, and the relationship between these two concepts.

It is possible that, as Indian religious scholars visited Ancient Greece, the Upanishads could have influenced early Greek thought. Parallels between Plato's philosophy and concepts in the Upanishads can be easily discovered.

Page 447. " It was I killed the old pawnbroker and her sister Lizaveta "
Fyodor Dostoevsky by Vasily Perov
Public DomainFyodor Dostoevsky by Vasily Perov
 This is a famous line from Dostoevsky's Crime and Punishment. In the novel, the student Raskolnikov murders with an axe an elderly pawnbroker, and then her sister, who stumbles into the middle of the crime. He does this not simply to steal the pawnbroker's money, which he never uses, but also as a manifestation of his philosophy that some people are not morally obliged to follow the laws which govern society. The murder happens at the beginning, so that Raskolnikov's struggle with his guilt becomes the main focus of the novel.

Crime and Punishment is seen as an important influence on The Secret History, as both describe the psychological effect of murder on murderers.