Polish artist, 1853-1926, best known these days for the painting above, The Moon (1884).
Most of his work I can find online looks like these, lovingly rendered images of country life.
I enjoy these watercolors of Italy about which I can find nothing. I did find another painting of his done in Italy in 1904, in a very similar style, so perhaps these were done on the same trip.
This is Poppies, 1911, which represents a shift of style by Maslowski toward something like impressionism. Or maybe his vision was just going. Maslowski stopped painting not long afterward, so he left no impressions of World War I or Polish independence.