German regional gazetteers and Wikipedia articles for Prussian-era and present-day localities · Meyers Gazetteer; GOV/genealogy.net; AGOFF; Wikipedia (de/en)
Meseritzer Schlosswäldchen, Meseritz, Posen, Posen, Preussen
The 1912 index places Kreis Meseritz in Regierungsbezirk Posen, Province of Posen (quoted here from the entry 'Meseritzer Schlosswaeldchen', which names the Kreis and province). de.wikipedia 'Kreis Meseritz' gives the Kreis town as Miedzyrzecz; pl.wikipedia 'Miedzyrzecz' gives 52.447222, 15.578333.