Enjoying "Macbeth," by William Shakespeare
http://www.pathguy.com/macbeth.htm
An interesting website with analysis, history, pictures, and many weblinks.
Daemonologie
http://www.sacred-texts.com/pag/kjd/
The Daemonologie (1597), a discussion on witchcraft and the supernatural by King James I.
Glamis Castle
http://www.glamis-castle.co.uk/
Photographs and history of the actual Glamis Castle.
Macbeth
http://www.shakespeare-online.com/playanalysis/macbeth.html
A variety of resources and links at Shakespeare Online.
Shakespeare: Macbeth - Freud on the Macbeths
http://http://web.singnet.com.sg/~yisheng/notes/shakespeare/mbeth_f.htm
Sigmund Freud's analysis of Macbeth and Lady Macbeth. From Some Character-types Met With In Psycho-analytical Work (1916).
Shakspeare's Works: A Timeline
http://www.bardweb.net/plays/timeline.html
A timeline of composition and publication for all of Shakespeare's plays.
The Tragedy of Macbeth
http://www-tech.mit.edu/Shakespeare/macbeth/index.html
E-text of the play.
The Upstart Crow
http://internetshakespeare.uvic.ca/Library/SLT/life/groatsworth2.html
Shows a copy of a page from Robert Greene's Groatsworth of Witte (1592), containing the earliest record of Shakespeare as a playwright.