From A Bibliography of Alexandre Dumas père by Frank Wild Reed: During this year Dumas gave a number of popular lectures at Havre, at the time of the International Marine Exhibition.
According to Ferry, most of these lectures dealt with the Russian tour and the experiences Dumas there encountered.
An account of this journey and the lectures appeared in a series of chatty articles in the Paris press.
Apparently these articles have not been collected and reprinted, unless the item below is a portion of them.
References :—
Ferry: "Dernières Années d'Alexandre Dumas," pp. 179-252. Glinel: "Alexandre Dumas et Son Œuvre," pp. 475-76.