Between Miinden and Minden its course lies through a picturesque valley flanked by irregular and disjointed ranges of hills (Reinhardswald, Sollinger Wald, Weser Hills, &c.); but after it emerges from these mountains by the narrow pass called the "Porta Westfalica," near Minden, its banks become flat and uninteresting.
corner of the province the Weser divides the Wiehengebirge from the Wesergebirge by the narrow pass called Porta Westfalica.
to the south of Minden is the so-called "Porta Westfalica," a narrow defile by which the Weser quits the mountains.
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