A State may legislate in aid of the enactments of Congress.1 And, as seen above, the courts of a State may pass upon the legality of an arrest. The provision is a national police regulation. See FUGITIVE; REQUISITION; EXPRESSIO, Unius, etc. L. To make, do, perform. Compare FIERI. Fac simile. Made like in appearance; a copy. Said of counterfeits, designs, signatures, trademarks, qq. υ. Facias. That you make or cause to be made. See EXECUTION, 3, Writs of. Facies. Appearance; view. See PRIMUS, Prima, etc. Factum. A thing done; a fact. See F. F. Fieri facias. See EXECUTION, 3, FACTUM. Writs of. F. J. First judge or justice. Roberts stood indicted for the larceny of railroad bonds. 1 Exp. Ammons, 34 Ohio St. 518 (1878); Wilcox υ. Nolz, ib. 520 (1878), cases. Robb v. Connolly, 111 U. S. 624, 637 (1884). 3 See generally Re Leary, 10 Bened. 208, 205-22 (1879); 18 Blatch. 430; 8 Law. 370; 2 Flip. 183; 16 F. R. 93; 7 Op. Att. Gen. 6; 8 id. 306, 396, 521; 63 Ind. 344; 50 Iowa, 106; 34 Ohio St. 71-79; 4 Tex. Ap. 662; 60 Wis. 594; 18 Alb. Law J. 146-51; 2 West Coast Rep. 599. Rules proposed by Inter-State Conference, 36 Alb. Law J. 220 (Sept. 10, 1887). The new extradition bill, 37 id. 88-93 (1888), A. T. Spear. 4 Whalen v. Sheridan, 10 F. R. 662 (1880); Müller v. Ehlers, 91 U. S. 251 (1875). * Moses v. Sun Mut. Ins. Co., 1 Duer, 170 (1852); The Titania, 19 F. R. 105 (1883). Qui facit per alium, facit per se. He who acts through another acts by himself. The act of the agent is the act of the principal - within the scope of the employment. The authorized act of an agent is imputed to his employer. An act done by one under the command and direction of the owner of a vessel, with his approbation and for his benefit, is as much his own act in contemplation of law as if done by himself. To this extent at least the maxim applies. And it is not material whether the act is done in his absence from, or his presence in, the scene. See AGENT; CONTRACTOR. 1 Aberdare v. Hammett, L. R., 10 Q. B. 165-66 (1875). 21 Wall. 93; 5 id. 734. $ 96 U. S. 267. 4 See Osgood v. Bringolf, 32 Iowa, 270 (1871). United States v. Gooding, 12 Wheat, 472 (1827), Story, J. See also 1 Bl. Com. 474; 91 U. S. 312; 48 Ark.