(Those Who Would Dare Speak the Truth)

Through iron bars and sooty glass,
you see a square of muddy snow,
where cawing rooks and jackdaws pass
over the heads of those who go
no further than the prison walls—
mothers, fathers, weeping wives
bearing bags of fruit and rolls
to those whose candour cost their lives.

Leo Yankevich

http://www.poemhunter.com/poem/moscow-1928/