Todd K. Bender 
A Concordance to Conrad“s Heart of Darkness [PDF ebook] 

Originally published in 1979, this concordance to Heart of Darkness is intended for use by the general student of Conrad who wants to determine the exact denotation and connotation of Conrad’s vocabulary, or the patterns of imagery in his work, quickly and effortlessly. It prints under each word every logical context in which it occurs. This volume is part of a series which produced verbal indexes, concordances, and related data for all of Conrad’s works.