Photographer: Unknown. Annotations on envelope: konverta net. Annotations on negative: Na snimke nadpis' '¹579 – Diapozitiv «Osinovskii porog. Ostrov «Korablik». 1927 g. Tyurin P.V. To zhe, chto i ¹587. Additional observations: staryh nomerov net, nadpis' tol'ko na negative. Condition of original: diapozitiv razloman i nepolon, est' dve chasti. Date: not recorded. Keywords: sudohodstvo.