author
A little-known Esperanto travel writer, this author is remembered for a vivid early-20th-century journey through Russia. The surviving record points most clearly to En Rusujo per Esperanto, a book shaped by curiosity, correspondence, and the hope that a shared language could bridge cultures.

by A. Rivier
Very little biographical information about A. Rivier appears to be readily confirmed online. The clearest surviving source trail centers on En Rusujo per Esperanto, a public-domain Esperanto travel narrative available through Project Gutenberg.
That book presents Rivier as a traveler writing about a journey from Algiers to Russia, describing meetings with local people, social conditions, and the practical challenge of traveling without Russian while relying on Esperanto. The work suggests an author deeply interested in cross-cultural contact and in Esperanto as a real-world tool for communication.
Because reliable biographical details are scarce, it is safest to remember A. Rivier through the work itself: an account of travel, language, and human connection from the early 1900s. For readers interested in Esperanto literature or unusual travel writing, that surviving book is the best introduction.