The immigrant or “strange farmers” are generally welcomed by the land-owners, who usually manage to lease them the fields which require the most cleaning. After the immigrant farmer has reaped his groundnut crop, the field is left in a good state of tilth for the owner to sow his guinea corn. The occurrence of ruinous competition among merchants at Bathurst induced them to form a “combine” to regulate the buying price of nuts; the purchases being pooled and then divided according to a fixed scale. A recent attempt to divert Gambian nuts to Senegal ports for shipment, by the levy of an import tax at Marseilles, was opposed by the French and British merchants alike, and the fear that the produce might only be diverted to another destination led to its abandonment. For further information regarding the cultivation, varieties and uses of groundnuts, see _Bulletin of the Imperial Institute_, vol. viii. (1910), pp. 153-72. =RUBBER.=—A good quality of rubber is produced in the Jolah country, in particular, from _Landolphia Heudelotii_, an apocynaceous vine, which grows commonly in the grass lands of Fogni. The vine is tapped by women, who, after digging a hole near the root of the plant, make a number of transverse cuts upon the root-stem. The latex flows rapidly from such cuts, and is coagulated by throwing salt water on the wound. The scrap rubber which forms is collected the following day, and the pieces are attached to one another, forming an open sponge-like ball of a pinkish-white colour. Sand is often present in these balls owing to the fallen latex being added to the rest. [Illustration: RUBBER VINE (_LANDOLPHIA HEUDELOTII_) AT KOTOO. Fig. 4. p. 9.] [Illustration: CEARA RUBBER TREE (_MANIHOT GLAZIOVII_) AT BAKAU. Fig. 5, p. 10.] [Illustration: RUBBER TREE (_CASTILLOA ELASTICA_) AT KOTOO. Fig. 6, p. 10.] In addition to the inhabitants themselves collecting rubber, natives belonging to a tribe from Portuguese Guinea, called “Manjagos,” travel through the country for the purpose; the rubber which they obtain being sold in the French Colony to the south of the Gambia. The “Manjagos” are said to make a semicircular cut upon the thick vine-stems just above the ground, to induce the better flow of latex. This, they maintain, is not a destructive method, and that, as the root stock is uninjured, the plant continues to yield latex for a long time. At one time the rubber vine must have been plentiful, but the rush for it which occurred at the beginning of the present century has had the effect of exterminating it, except in the more inaccessible places. The export has declined and is now insignificant. The plant is known to the Mandingoes as “Folio.” An illustration is given showing this plant at Kotoo (Fig. 4).