Thanks to https://thames.me.uk/sailing1817.htm and on Google \books FROM THE NORE THROUGH THE SWIN AND KING’S CHANNEL TO HARWICH AND ORFORDNESS. 1817: Description of the Buoys and Beacons, from the Nore through the Sledway to Orfordness Shoebury-knock buoy. No. 1, blacklies in 3 fathoms to be left on the larboard side […]