Aleksandr Aleksandrovich Blok (1880 ~ 1921)

The text by Blok is Двойник, The Double.

The historical background and literary criticism (in English) have been provided by Olga Soboleva, Russian Language Co-ordinator at the London School of Economics.

For a biography and some more of Blok's work, see Russian Poets of the 20th Century (click on 'Poets' then the top orange circle).