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/ THOMPSON'S COAST PILOT. 57 one being well indicated by the following range lines, viz: a line from Grosse Point to St. Ignace, and a line from the NE side of St. Helena to Point la Barb. TO MAKE A HARBOR AT ST. HELENA. From Old Mackinaw NWbyWéW 6 miles, leaving Point la Barb at a distance of 1? miles to starboard, and the island to port; haul round the NE point of the island, giving it a good berth, and come to in the bay to the northward of the dock, in from 5 to 9 fathoms water, soft bottom. A Lighthouse is to be erected on this island. TO LEAVE 8ST. HELENA NORTH ABOUT. Haul close round the NW end of St. Helena, and steer WhyS28 3 miles, to clear a shoal which lies due west from the island. 'This shoal can be passed on either hand, and has from 8 to 15 feet water on it. WSW3S takes you to Point Waugo- shance Lighthouse. FROM MACKINAW TO THE DETOUR PASSAGE, THIRTY-SIX MILES, AS FOLLOWS: From Mackinaw Harbor east 9} miles, to a point 2 miles north of Bois Blane Lighthouse; thence EbyN4$N 262 miles, to a point 1 mile east of Detour Lighthouse; and note that this course leaves St. Martin's reef 4 a mile to the northward and 114 miles from Detour Lighthouse. 7 FROM MACKINAW TO DUNCAN DOCK OR SHEBOYGAN BAY, SIXTEEN MILES AND A HALF, AS FOLLOWS: From the middle of Mackinaw Harbor WbyS#S 1 mile, to shut Bois Blane Lighthouse in behind Round Island; thence SEbyS¢S 6 miles, to clear the Zella Shoal which sets off the west side of Bois Blanc Island; thence SES 92 miles to the dock at Duncan. ; SHEBOYGAN RIVER. . This river is about 2 miles west of Duncan Dock, and isa fine little stream. Has two saw mills, and a great quantity of square timber is got out here. There is 6 feet of water over the bar. Vessels can go in and load to that mark, and finish outside. The bar is composed of slabs, sawdust and logs; and