Ambassador Thompson to the Secretary of State .
President Diaz asks if measures can not be taken by American authorities to prevent the sale of arms and ammunition in our territory to be smuggled into Mexico or smuggled in by the owners to [be] sold to the Indians. Much of this is done, Indians paying big prices causing much daring on the part of men with such supplies [to] sell. In view of the fact that Mexico is doing all possible to control the Yaquis, the constant complaints from our countrymen of lack of control and the further fact that the Indian supply is thought to be constantly through our country, it seems likely great help to Mexico in its efforts to gain perfect control of the Indians would be given if our Government could stop the traffic named. To do this might necessitate the patrol of the Sonora frontier. Mexico is now doing this to the best of her ability.