The River Cong is a stream in the west of the county of Norfolk, only 1.5 miles (2.4 km) in length.^[1] It is a tributary of the River Babingley. The spring rises in a meadow pool on the Hillington side of Manor Farm, Congham. From there, it flows through the wood and over a small waterfall, where in the past it powered all the machinery within the Congham Oil Mill (grid reference TF71342475), which is now known as Congham Lodge.^[2]

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River Cong
River Cong
Location of the river mouth within Norfolk
Location
Country	England
State	Norfolk
Region	East of England
District	King's Lynn and West Norfolk
Physical characteristics
Source
• location	Manor Farm, Congham
• coordinates	52.7865°N 0.5499°E / 52.7865; 0.5499
• elevation	19 m (62 ft)
Mouth	River Babingley
• location	west of Hillington
• coordinates	52.8006°N 0.5311°E / 52.8006; 0.5311
• elevation	13 m (43 ft)
Length	1.5 mi (2.4 km)
Basin features
River system	River Babingley

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The name of the stream does not appear on current Ordnance Survey maps, and few sources name it. One appearance of the name is in the neighbouring village of Congham, whose name is listed by one source as meaning "dwelling by the River Cong",^[3] though more recent sources suggest a possible direct meaning of dwelling "at the hill".^[4]

The mill is said to have been built for processing whales. Whales were transported from King's Lynn docks by horse and wagon. The mill produced oil from whale blubber. The resultant whale bones were then taken by road to Narborough Bone Mill where they were ground into fertiliser. Some of the whale bones remain as ornaments at Congham Lodge to this day. The waterfall that drove the mill still remains. There would have been a horrendous smell especially in the summer, which was why the mill was situated away from King's Lynn itself. The Cong then flows on under the A148 and joins the Babingley close by the Gatton Waters caravan site.

• The River Babingley