Edited detail from a map of <a href="//commons.wikimedia.org/wiki/East_Prussia" class="mw-redirect" title="East Prussia">East Prussia</a> (Germany). <b>Red</b> limits of Niederung County. <b>Yellow</b>: modern international boundary between Lithuania (north) and Russia (south).
<i>Uploader</i>: Michael König (<a href="//commons.wikimedia.org/wiki/User:Magadan" title="User:Magadan">User:Magadan</a>) <small><a href="https://de.wikipedia.org/wiki/Benutzer_Diskussion:Magadan" class="extiw" title="de:Benutzer Diskussion:Magadan">→ Message</a></small>.
1907
Vogels Karte des Deutschen Reichs (Map of the German Empire). Scale 1:500,000. Perteis, Gotha, 1907. Sheet 5: Königsberg.<br>Author: Carl Vogel (1828-97). Drawn by V.Geyer, H.Kehnert, O.Koffmann, P.Langhans, M.Risch and C.Scherrer.