"A Discourse on Marriage and Wiving"
http://www.folger.edu/documents/STC%2018514Discourse%20of%20marriage%20(3%20pages).pdf
A 1615 pamphlet about marriage written by Alexander Niccholes.
A Cultural Context for Othello
http://www.shakespearetheatre.org/plays/articles.aspx?&id=83
A brief essay outlining the culture that informed the play.