Joseph Conrad Society Website
http://www.josephconradsociety.org/scholarly_resources.htm
The Joseph Conrad Society is "devoted to the study of all aspects of the writings and life of Joseph Conrad" and aims to "provide a forum and resource for Conrad scholars throughout the world and those with a strong interest in things 'Conradian.'" The website includes extensive resources on the life and work of Conrad.
The Joseph Conrad Collection at Yale University
https://archives.yale.edu/repositories/11/resources/588
The Joseph Conrad Collection at Yale University consists of writings, correspondence, drafts, and other materials of or relating to Joseph Conrad.