Joseph Jumentié (1879–1928), through his clinical skill and expertise in anatomical pathology, enhanced the prestige of the master neurologists he studied under— Jules Dejerine, Augusta Dejerine-Klumpke and Joseph Babiński —and their fame overshadowed the crucial support that Jumentié provided them. Following a remarkable doctoral thesis in 1911, which defined the semiology of tumors in the cerebellopontine angle, Jumentié conducted research into various areas of neurology and authored numerous publications. The present report discusses, as examples of his work, his research on the cerebellum and brain tumors, as well as his contribution to Dejerine-Klumpke's use of serial sectioning to identify the ‘fasciculi’ of corticospinal tracts. This discussion is introduced by a brief biography illustrated by photographs, most of which have never before been published.