These subsidiaries are bound hand and foot to the parent company and must do just what the parent company says. (…) This group is virtually the same as a partnership in which all the three companies are partners. They should not be treated separately so as to be defeated on a technical point. They should not be deprived of the compensation which should be payable for disturbance. The three companies should, for present purposes, be treated as one, and the parent company D.H.N. should be liable as that one.(42)…