Works
Links
Considerations on the Causes of the Greatness of the Romans and Their Decline
http://www.constitution.org/cm/ccgrd.htm
Two separate translations of Montesquieu's 1734 work of historical commentary.
Montesquieu: The Spirit of Laws
http://www.constitution.org/cm/sol.htm
The complete Nugent translation, available in HTML or plain-text formats.
Oxford University Comparative Law Forum: Montesquieu in England
http://ouclf.iuscomp.org/articles/montesquieu.shtml
Essay by Iain Stewart on Montesquieu's thought in relation to England, including a full translation of his Notes on England.
Persian Letters
http://www.class.uidaho.edu/mickelsen/texts/Montesquieu%20-%20Letters.htm
Text of the eleventh and twelfth letters, both from Usbek to Mirza.
Modern History Sourcebook: Spirit of the Laws
http://www.fordham.edu/halsall/mod/montesquieu-spirit.html
Excerpt from the first volume of Montesquieu's monumental 1748 opus.
De L'Esprit des Lois
http://www.ecn.bris.ac.uk/het/montesquieu/index.htm
Online French and English editions of the text. The English version is only available in PDF format.