They moved in 1950 to the island of Noirmoutier,[1] where she worked as an architect,[2] and where Jean died in 1955. Yablonska died in a car accident on 4 February 1971 while en route to Paris with the manuscript of her final work, Two Weights, Two Measures (Dvi vahy—dvi miry; Дві ваги — дві міри). Sofia and Jean were buried next to each other in Vernouillet, Yvelines but were reinterred on Noirmoutier in 1973.[4]