Article 19. The Government of the Transvaal State will strictly adhere to the boundaries defined in the First Article of this Convention, and will do its utmost to prevent any of its inhabitants from making any encroachment upon lands beyond the said State. The Royal Commission will forthwith appoint a person who will beacon off the boundary line between Ramatlabama and the point where such line first touches Griqualand West boundary, midway between the Vaal and Hart Rivers; the person so appointed will be instructed to make an arrangement between the owners of the farms Grootfontein and Valleifontein on the one hand, and the Barolong authorities on the other, by which a fair share of the water supply of the said farms shall be allowed to flow undisturbed to the said Barolongs. Article 20. All grants or titles issued at any time by the Transvaal Government in respect of land outside the boundary of Transvaal State, as defined, Article 1, shall be considered invalid and of no effect, except in so far as any such grant or title relates to land that falls within the boundary of the Transvaal State, and all persons holding any such grant so considered invalid and of no effect will receive from the Government of the Transvaal State such compensation either in land or in money as the Volksraad shall determine. In all cases in which any native chiefs or other authorities outside the said boundaries have received any adequate consideration from the Government of the former South African Republic for land excluded from the Transvaal by the First Article of this Convention, or where permanent improvements have been made on the land, the British Resident will, subject to the approval of the High Commissioner, use his influence to recover from the native authorities fair compensation for the loss of the land thus excluded, and of the permanent improvement thereon. Article 21. Forthwith, after the taking effect of this Convention, a Native Location Commission will be constituted, consisting of the President, or in his absence the Vice-President, of the State, or some one deputed by him, the Resident, or some one deputed by him, and a third person to be agreed upon by the President or the Vice-President, as the case may be, and the Resident, and such Commission will be a standing body for the performance of the duties hereinafter mentioned.