This black and white picture was taken in 1951 of the coal boats being unloaded at the Harbour. At the time the square head was constantly dredged and a channel was kept open for the coal boats to enter the Harbour.
Today worn smooth pieces of coal originating from the unloading can be found in the Harbour of diffent varieties. One such type is one of the varieties that is used for gas production, it is harder than normal coal and can be crafted. In fact it has been known to be polished and passed off as fake whitby jet.