These are taken from this Flickr set.
May Day celebrations in Helsinki, ca. 1900
Mikonkatu, Helsinki, ca. 1900
Restaurant Opera Cellar, Helsinki, ca. 1900
Russian military, Helsinki, ca. 1900
Russian soldiers in Helsinki Senate Square, ca. 1900
Seashore of Töölönlahti, Helsinki, ca. 1900
Seurasaari, Helsinki, ca. 1900
The Market Square, Helsinki, ca. 1900
The steam ship "Östra Skärgården" outside the Market Square in Helsinki, ca. 1900