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THOMPSON'S COAST PILOT. 43 of Bois Blanc Lighthouse; thence EbyN4N 263 miles, to a point I mile east of Detour Lighthouse; and note that this course leaves St. Martin's Reef 4 mile to the northward and 114 miles from Detour Lighthouse. FROM MACKINAW TO DUNCAN DOCK OR SHEBOYGAN BAY, SIXTEEN MILES AND A HALF, AS FOLLOWS : From the middle of Mackinaw Harbor Wby83S 1 mile, to shut Bois Blanc Lighthouse in behind Round Island; thence SEby8iS 6 miles, to clear the Zella Shoal which sets off the west side of Bois Blanc Island; thence SE4S 94 miles, to the dock at Duncan. | : : SHEBOYGAN RIVER. This river is about 2 miles west of Duncan Dock, and is a fine little stream. Has two saw mills, and a great quantity of square timber is got out here. There is 6 feet water over the bar. Ves- sels can go in and load to tliat mark and finish outside. The bar is composed of slabs, sawdust and logs; and a very little dredging and other improvements would make it a good place to load. FROM DUNCAN DOCK TO DETOUR LIGHTHOUSE, THIRTY-FOUR MILES," aie ) AS FOLLOWS: From the dock north 14 14 miles; thence NE3E 325 niles to a point 1 mile east of Detour Lighthouse. Carp River Mills, Carp River, 10 miles north of the NW end of Mackinaw Island. Vessels load to anchor in 2 fathoms water. A harbor can be made in the neighborhood of this; river in any kind of weather; Grose Isle. St. Martin, Isle St. Martin, and Point St. Martin, forming a good shelter from southerly and easterly winds. To make a harbor, run round Grose Isle St. Martin, leaving it to the eastward, and come to, with the island bearing south, in from 44 to 6 fathoms water, mud bottom. To run up to Carp River. Mills, after passing the Graham Shoals, and the range of Rabbit's Back Point with Point St. Ignace, 4 mile, haul up due north, leav- ing Grose Point to port } mile, and Grose Isle St. Martin 13 miles to starboard. You will carry 5 fathoms water until you are L mile north of the island; and as you approach the river, haul