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THOMPSON'S COAST PILOT. 115 From Thirty-Mile Point to Fort Niagara WSW 26 miles. From Tibbett's Point to Jordan Point WbyN4N 5 miles. From Tibbett's Point to Pigeon Island W3S 8 miles. _ From Gravely Point to Tibbett's Point SWS 3 miles. From Grenadier Island to anchorage off the Real Dueks NE by E 11 miles. From Upper Gap of Bay Quinte to the Three Sister Islands, at the lower end of Amherst Island, ENE 9 miles. From Duffin's Bay to Niagara SbyW 40 miles. From Big Sodus to Presqu'ile NWbyN 60 miles. From Big Sodus to Long Point NbyW 88 miles. | From Nine-Mile Point, west of Oswego, to Braddock's Point WS 52 miles. OAKVILLE. : . The Port of Oakville is 22 miles W2S from Toronto, and 14 miles NEbyN from Burlington Canal. The piers are 100 feet apart, and run out nearly north and south into the lake. Danerr.--Between the port and Port Credit there is a shoal, and numerous large boulders, extending a considerable distance out from the shore, which should not be approached nearer -- than a mile. ee WELLINGTON SQUARE AND NELSON. These small ports are situated between Oakville and the Bur- lington Canal. Their docks run out into 10 feet water. No protection from east and south or south-east winds. OAK ORCHARD CREEK / Is 35 miles west of Genesee River, and 52 miles E of Niagara. The entrance to this creek is between two piers, running north and south, into 6 feet 6 inches water, and 160 feet apart. The west pier is 844 feet. long, and the east pier is 734 feet; the basin or pond inside has plenty of water, and is well secured from all winds. VARIATION OF THE COMPASS ON LAKE ONTARIO, There is little or no variation of the compass at the west end of Lake Ontario. The variation at the east end is from 1° to 2° west, and at Kingston 6° west. ,