The ground of complaint against the American Tobacco Company rested not alone upon the nature and character of that corporation and the power which it exerted directly over the five accessory corporations and some of the subsidiary corporations by stock ownership in such corporations, but also upon the control which it exercised over the subsidiary companies by virtue of stock held in said companies by the accessory companies by stock ownership in which the American Tobacco Company exerted its power of control. The accessory companies were impleaded either because of their nature and character, or because of the power exerted over them through stock ownership by the American Tobacco Company, and also because of the power which they in turn exerted by stock ownership over the subsidiary corporations; and finally the subsidiary corporations were impleaded either because of their nature, or because of the control to which they were subjected in and by virtue of the stock ownership above stated. We append in the margin a statement showing [221 U.S. 106, 144] the stock control exercised by the principal defendant, the American Tobacco Company, over the five accessory corporations, and also the authority which it directly exercised over certain of the subsidiary corporations, and a list showing the control exercised over the subsidiary corporations as a result of the stock ownership in the accessory corporations, they being in turn controlled, as we have said, by the principal defendant, the American Tobacco Company. 2 [221 U.S. 106, 145] The two foreign corporations were impleaded either because of their nature and character and the operation and effect of contracts or agreements with the American