An expression used formerly in this country to denote the limits ofadmiralty jurisdiction. See United States v. Aborn, 3 Mason, 127, Fed. Cas. No. 14,418;Hale v. Washington Ins. Co., 2 Story, 176, Fed. Cas. No. 5,916; De Lovio v. Bolt, 2 Gall.398, Fed. Cas. No. 3,776; The Hine v. Trevor, 4 Wall. 562, 18 L. Ed. 451; The Eagle, 8Wall. 15, 19 L. Ed. 365.