author
Known today mainly for a single surviving play, this little-documented Finnish author left behind a lively stage comedy centered on tangled relationships and domestic mix-ups. The mystery around the writer adds an extra layer of curiosity for readers exploring rare works from the past.

by J. Lamberg
Very little confirmed biographical information about this author was available in the sources I found. Project Gutenberg lists J. Lamberg as the author of the Finnish play Sekavia solmuja: Huvinäytelmä 3:ssa näytöksessä, and that appears to be the work most clearly associated with the name.
Based on the available edition notes, Sekavia solmuja is a Finnish-language comedy play in three acts from the late 19th century. The story is built around misunderstandings, family tensions, and shifting personal loyalties, giving it the quick-moving, conversational energy of stage entertainment from its era.
Because reliable biographical records were not easy to confirm, it is best to think of J. Lamberg as a largely obscure literary figure whose surviving work offers a small but interesting glimpse into older Finnish theater.