Link to full text in English:

http://www.gutenberg.org/files/467/467-h/467-h.htm

Link to full text in French:

http://gallica.bnf.fr/ark:/12148/bpt6k575827/f1.image

Link to La Princesse de Clèves by Lafayette: A New Translation and Bilingual Pedagogical Edition for the Digital Age: (I highly recommend this great resource)

https://www.fulcrum.org/concern/monographs/cc08hj19v