The article contains an editorial study of thirteen letters from the years 1899-1900, addressed to Henryk Sienkiewicz for the twenty-fifth anniversary of his literary activity. To celebrate the occasion, notes of congratulations, wishes, and sometimes even literary works, were sent to Sienkiewicz. Among the authors of these letters, one can identify artists, editors, or literary historians (Jan Styka, Julian Ochorowicz, Jan Piński, and Zygmunt Sarnecki, among others). The presented material is located
in the Jagiellonian Library collection in Kraków (item code 6998 IV).