sentences:  During Mandelstam's years of imprisonment, 1934–38, Nadezhda accompanied him into exile.Given the real danger that all copies of Osip's poetry would be destroyed, she worked to memorize his entire corpus, as well as to hide and preserve select paper manuscripts, all the while dodging her own arrest.In the 1960s and 1970s, as the political climate thawed, she was largely responsible for arranging clandestine republication of Mandelstam's poetry.