Today’s image is from the book (s.p.b.s) and shows the high-light at Thorgumbald Marsh. It is described in the book as ‘a circular wrought iron structure and stands on a circular brick and masonry foundation’. It is 49 feet high and can still be walked up to today, although, the spiral staircase shown in the drawing has long gone. The description of the light is somewhat specialist but included two oil burners (like ignition burners) and two silver-plated reflectors, the resulting candle power being then 640. At ‘High Water Ordinary Spring Tides’ the visibility range was 12 nautical miles.
Both the high and low light at Thorngumbald were constructed in 1870.
I was surprised to read that these lights at Thorgumbald were to guide ships through the navigable channel from the Victoria Dock, Town Docks and William Wright Dock area, and not, as I had previously thought to guide ships through Hull Roads from the Immingham area of the south bank.
We are all in the business of learning/being corrected.