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* 38 THOMPSON'S COAST PILOT. 7 THE DUCK ISLANDS, LAKE HURON. 'The Duck Islands lie NbyE4E 48 miles from Thunder Bay Island Lighthouse, U. 8., and WbyNZN 63 miles from Coye Island, OC. W. There is good holding ground between the Great Duck and Outer Duck Islands. The Outer Duck is to the eastward of the Great Duck, off the south end of it. To make a harbor, bring the passage open between the two islands, bearing Nby W4W, and haul up on that course, leaving the reef off each island on each side, in 22 to 30 feet of water. There is 15 feet of water on the end of the Great Duck Shoal, and 11 on the Outer Duck. These two reefs run out about SSE, which makes a good lee. Run well up and past the south end of the Great Duck, and come to; anchor in any part of the bay. S | There are two good passages between these islands; one between the Great Duck and Middle Duck, and the other between the West Duck and Middle Duck. These passages can be plainly seen in clear weather. TO RUN INTO GEORGIAN BAY BY FITZWILLIAM ISLAND CHANNEL. From the Duck Islands to the south point of Fitzwilliam Island EbyS 60 miles. When 'abreast the point, haul-up NE 4 miles, leaving Lucas Island and Yeo Island to starboard (and note that a small island, called James Island, with a reef running SW from it, lays NE from Yeo Island ;) thence SEbyE 263 miles to Cabot's Head, leaving half Moon Island 34 miles to the northward. Nothing less than 80 to 40 feet through this channel. To run through to. the southward of Lucas Island, leave Yeo Island and James Island NE of Lucas, to the northward, steering due east for 11 miles ; thence SEbyE for Cabot's Head. Cape Hurd Channel is very difficult, and cannot be run except with a good pilot. 'Tober Moray or. Collin's Harbor is an excellent one, lying SE southerly from the east end of Cove Island, and is 3 easy of access by daylight. : Mississauga Passage is deep--from 30 to 204 feet water. To