Illustrated Treatise on the Maritime Kingdoms, Volume 57

To the east, this region borders Poland original: 波蘭 (Bolan). Its area covers 16,049 square li Wei Yuan uses the Chinese li, but these figures are derived from 19th-century European sources, likely referring to German square miles, with a population of 1,570,003 people. It governs forty-one small districts. Its Posen original: 孛斯旦 (Bositandan); modern Poznań department was an ancient capital. Additionally, the Frankfurt original: 佛郎賀 (Folanghe); referring to Frankfurt an der Oder department is situated near the Oder original: 阿達 (Ada) River. Every five years, a grand market is opened for trade The text says "every five years," though this may be a transcription error or a reference to specific large-scale trade fairs, attracting merchants from both Russia and Poland. The soil here is poor; despite the inhabitants' greatest efforts at cultivation, the harvest is insufficient for their needs. Local products include tobacco original: 煙芒 (yanmang), woolen cloth original: 蘇呢布 (sunibu), timber, silk, bristles, porcelain original: 磁器 (ciqi), and glass.

The Province of East Prussia original: 東普魯社部 (Dong Puluoshe bu)
Its eastern border meets Russia; its southern border meets Poland; its western border meets West Prussia; and its northern border meets the Frozen Sea The Baltic Sea.

The total area is 9,985 square li. The population consists of 772,577 people. It governs forty small districts. Its primary department is called Königsberg original: 南寒 (Nanhan); modern Kaliningrad, which contains three cities where commerce is highly prosperous. The local products of this province are the same as those of the East Prussia The text repeats "East Prussia," likely referring back to the general Prussian trade goods mentioned in the preceding section region.