There is a book called (Sakhalin Island "Остров Сахалин" ) by Chekhov who is known as a playwright, novelist.
Content of this book is a travel records and
survey of Sakhalin, it has been published year 1893 to 1895 in Moscow.
Famous writer Chekhov was a famous doctor also, that age in Sakhalin prison camp heinous criminals
hang out. He took three months travel to get there and
staying three months. He worked for prison, military hospitals, inspected
the sanitary conditions of the barracks (isolation ward), and care
consultation the convicts, says wrote 10,000 medical records.
Chekhov's life was together with the Russian people of suffering in that undeveloped age, to help people as doctor. Also Chekhov talked about Rinzo Mamiya and his book, Rinzo has been the Strait
discovery, "Sakhalin rights of virgin exploration It
belongs to the Japanese without any doubt that the Japanese have been
noted as the first to be had territorial southern Sakhalin. "