Messrs. Homer S.C.ummings, Atty. Gen., and James W. Morris, Asst. Atty. Gen., for petitioners.
Messrs. Claude R. Branch and John L. Hall, both of Boston, Mass., for respondents Welch and others.
Mr. Wm. D. Mitchell, of New York City, for respondent Marshall.
Mr. Justice ROBERTS delivered the opinion of the Court.