Mapa rozsiedlenia ludności polskiej w granicach etnograficznych i na najbliższych kresach, 1915

(Distribution map of the Polish population by its ethnographic boundaries), Warsaw, 83 x 97 cm, at  1: 1 000 000. Published by the Polish Union of Progressive s, and supposedly showing concentrations of “ethnic Poles.” Three years earlier, on Orgelbrand’s map, the percentage of Poles in a broad area around Vilnius was 6% to 12%, with Vilnius center as high as 30%. In the 1915 map, the percentage leaps to 50% to 100% in the same areas. There were no censuses in the meantime, only guesstimates by “Progressive” Poles eager to claim the Vilnius area as their own.