
    
      Certiorari Granted.
    
    No. 451.
    Comstock v. Group of Institutional Investors et al.; New Orleans, Texas & Mexico Railway Co. v. Group of Institutional Investors et al.; Thompson, Trustee, v. Group of Institutional Investors et al.; and Comstock v. Thompson, Trustee, et al.
    No. 452.
    No. 453.
    No. 454.
    
      William H. Biggs for petitioners.
    
      Charles W. McConaughy, Clair B. Hughes, Leonard P. Moore, Sanford H. E. Freund and Harry Kirshbaum for respondents.
   Certiorari granted.  