author
An early Esperanto writer and traveler, remembered for a lively account of visiting Russia at the start of the 20th century. What can be confirmed about this author is limited, which makes the surviving work feel like a small historical discovery.

by A. Rivier
A. Rivier is known from the Esperanto travel book En Rusujo per Esperanto, published in 1911. The book presents a journey through Russia and reflects the international, cross-border spirit that drew many early writers to Esperanto.
Available reference material suggests Rivier was a pioneer of Esperanto in Algeria in 1899 and was also listed among French Esperantists. Beyond that, biographical details are scarce in the sources I could confirm, so it is safest to remember this author mainly through the surviving book rather than through a well-documented life story.
That modest record is part of the appeal. Rivier's work offers a glimpse into the early Esperanto movement, when travel, language, and cultural curiosity were closely linked, and when a single book could preserve the trace of a writer who might otherwise have been forgotten.