He travel through Greece and the Aegean Islands and examined and copied many inscriptions, which were published in the bulletin de correspondence hellénique between 1880 and 1884.

[2] Dubois's first post was at the Faculty of Arts at the University of Nancy, which he joined in 1882 to teach ancient history.

A chair of colonial geography was finally established at the University of Paris on 16 May 1893, with Dubois as first professor, a position he held until his death.

In 1895 Dubois was appointed to the advisory committee of public instruction of the colonies, and was made a knight of the Legion of Honour.

[2] The Ligue de la patrie française originated in 1898 with three young academics, Louis Dausset, Gabriel Syveton and Henri Vaugeois, who wanted to show that Dreyfusism was not accepted by all at the University.