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64 | | THOMPSON'S COAST PILOT. neighborhood of the turning point towards Sheboygan, you have only to keep the lead going, and after running as near as possible your distance from Presquile, which is 50 miles, you may safely haul up to the westward for Sheboygan Lighthouse ; after which, shape your course for Old Point Mackinaw, NWbyWeW 16 miles. See entrance to Straits of Mackinaw. "FROM DETOUR TO FALSE DETOUR. A 10 foot spot 24 miles EbyS from Detour Lighthouse. Detached shoal 1 mile from shore, and 124 miles east of Detour Lighthouse. Spit extending 14 miles from shore, 24 miles west of Harbor Island. Shoal spot 4 a mile SW from east point of entrance to False Detour. : CANADIAN SHORE FROM FALSE DETOUR TO ST, CLAIR. Magnetic reefs in Mississauga Passage. Reefs between this passage and Green Island, and those around the Duck Islands. Reef between Providence and Michael Bay, and off south point of Michael Bay. 11 foot spot in Cove Island Passage: NW from Lighthouse, distance 2 miles. Spit extending 4 a mile west from Gat Point on Cove Island. Reefs extending out 3 miles between Cove Island and Cape Hurd. From Cape Hurd to the Chantry Islands the coast is very rocky, and dangerous for strangers, within 13 miles from the shore. The same char- acter is given to the coast from the Chantry Islands to Point -- Clark. At Point Clark a reef extends from the shore, which, together with a detached shoal, requires that this point should have a berth of 13 miles given it. From Point Clark to Goder- ich the coast is less dangerous, and may be approached safely within 4 a mile. The same is said of the coast from Goder- ich to Cape Ipperwash. At Cape Ipperwash a dangerous ledge extends to the northward for 14 miles; and between Cape Ipperwash and Point Harris there are boulders and rocky spots within 1 mile of the shore. From Point Harris to the head of the St. Clair River the coast is bold and gradually shelving, and can be approached with ¢ of a mile with safety.