Residents of the village of Heinrichau (now Wilkanówko) who were working in the fields, heard three loud booms similar to gun shots. The sky was quite clear except for one small cloud at the zenith. Just after these booms a loud whistle was heard which seemed to come from the west and got stronger, and stronger, and finally a thud was heard as if a heavy body hit the ground. The workers came to the source of the sound and found a stone in a pit half a foot deep. The shape of the pit suggested that the stone fell perpendicular to the ground. The workers feared to touch the stone thinking it was hot but it turned out to be completely cold. The meteorite found its way to the Royal Mineralogical Collection in Berlin (Pokrzywnicki, 1964). Source (PDF)
Grüneberg Ordinary (H4), veined Synonym(s): Griinberg; Heinrichau; Schloin; Seifersdorf; Seifersholz; Wilkanowko; Zielena Gora; Zielona Gora Approx. recovered weight: 1 kg A stone of about 1 kg fell near Heinrichau, after detonations (1841; J. Pokrzywnicki (1956). Source