www.julesverne.ca claims there is a publisher's catalogue of 24 pages dated October 1876 which may cause some confusion regarding dates.
The 95 illustrations noted by JVE suggest they were the original illustrations by Férat (91 and 6 in the original).
Sources:
- Title (Michel Strogoff), date (December 1876), publisher (Sampson Low), format (crown 8vo), price (10s6d), illustrations (95), translator and translation from Jules Verne Encyclopedia.
- Title (Michael Strogoff, the Courier of the Czar; and The Mutineers: A Romance of Mexico), date (1876), publisher (Sampson Low), translator and translation from jv.gilead.org.il.
- Title (Michael Strogoff, The Courier of the Czar), date (1877), publisher (Sampson Low, Marston, Searle and Rivington) and a cover image (not copied) from www.julesverne.ca.