2 [No. 99 GEOGRAPHY To the north of the mouth of the Congo lies the Cabinda enclave, which is administered by Portugal. The boundary between it and the Belgian Congo was for long in doubt, but on July 5 , 1913, it was defined by protocol. From the point ( 13° E. , 4° 40 ' S. ) at which French , Portuguese, and Belgian territory meet, the boundary follows the Shiloango river southwards as far as its confluence with the Lukula , and then ascends the latter river to the point (5 ° 10'S. , 12° 32' E. ) at which it is joined by the N’Zenze or Culla -Calla . From there a straight line is drawn southward as far as the parallel (5 ° 44 ' S. ) which passes through the sources of the River Lulofe on the western slope of the plateau of Nime Chiama. The boundary then runs along this parallel westward as far as Yema (5° 44' S. , 12 ° 18 ' E. ) , whence it follows first the Lulofe and then the Venzo river as far as Mallango . Beyond Mallango a purely conventional frontier runs to the coast, which is reached about 14 miles north of the lagoon of Lunga.

From the Cabinda enclave to the point at which the boundary touches theCongo the line between French and Belgian territory is defined in the main by minor geo graphical features. By the Convention of February 5, 1885, it was agreed that it should follow the Shiloango to its sources, and then continue along the divide between the waters of the Niari Kwilu (Quilloo) and those of the Congo about as far east as Manyanga. From this point to the Congo the frontier was left unsettled, but it was resolved that it should agree as far as possible with some natural division of the land, and that it should end at a point on the navigable portion of the river between the station of Manyanga and the cataract of Ntombo Mataka. A protocol of November 22, 1885, defined part of the boundary, which follows various minor irregularities of the land.

The frontier now changes in character By the