Henry M. Avery

Project Gutenberg lists Henry M. Avery as the author of Old Bear-Paw, the trapper king; or, The love of a Blackfoot queen and notes that he also wrote under the alias Max Martine. That suggests he worked in the lively world of popular adventure fiction, where rugged settings and cliffhanger plots were meant to keep readers turning pages.

Avery is associated with the dime-novel tradition, and a Northern Illinois University archive page preserves a portrait of him alongside material connected with that field. While detailed biographical facts about his life are hard to confirm from the sources I found, the record that remains presents him as a writer remembered mainly for vivid frontier entertainment rather than for a well-documented personal history.