With the enactment on December 19, 1942, of the misnamed “Settlement of Mexican Claims Act of 1942,” American nationals with claims based upon the international responsibility of Mexico for acts or omissions in contravention of international law appear likely to receive long-delayed satisfaction. Some of the claims are more than 60 years old. Awards were made by the United States-Mexican General Claims Commission in favor of some of the claimants more than 15 years ago, but to date no money has been paid to the beneficiaries of these awards. Various factors appear to have made this claims arbitration one of the most dilatory, inefficient, and unfortunate in our history. Claimants were notoriously lax in presenting evidence to the State Department, although in some cases they appear to have been hindered by the Mexican Government from obtaining necessary evidence in Mexico. The preambles to three conventions extending the life of the General Claims Commission allege that “it now appears” or “it has been found” that the Commission could not hear, examine, and decide the claims within the time limit fixed; but Judge Fred K. Nielsen, American Commissioner on that court, has pointed out with some vigor that it was not the Commission, so much as the failure of American counsel and the Department of State, to prepare cases for presentation to the Commission, which caused the delay and paucity of decisions. Resignations of Commissioners, protracted delays in replacing them, antagonisms between Commissioners, and lack of cooperation by the Mexican Government were other factors contributing to the 19-year delay in effecting a settlement.