A scholar here is looking for free (or low-cost) GIS boundary files for historical Polish administrative divisions, specifically for [1] Poland under the Partitions (1795-1806); [2] Poland under Napoleon (1806-1812); [3] Polish during the Polish kingdom period (1815-); [4] Interwar Poland (1918-1939); and [5] Communist Poland (or Poland between 1945 and 1998 [when the Communist boundaries were changed]).

I'd be enormously grateful for any suggestions.

Many thanks.

Chris Winters
University of Chicago Library