St. Ives, High Tide and the Old Lighthouse

It was low tide, when I began sketching this boat in the huge harbor of St. Ives. I positioned my stool and stuff and was almost done with the drawing, when suddenly I felt the need to turn my head. A tidal wave moved gentle but steadily towards me. I had 5 seconds to grab everything and move away quite a bit with the hope to be able to turn back to my place, but obviously the water had no intentions to disappear. So I decided to face the facts and I moved on to the lighthouse on the Pier, high and dry. After a few minutes, the boat was surrounded by water, the high tide had reconquered the inner harbour again. Therefor I had to colour it later, in a more comfortable place...