I don't want to spoil your historical order of things but had to bring this which I stumbled upon. It is Sun Rising Through Vapour and is as early as 1809.
The detail can be seen on good copies.
Such a genius.
Never mind Roger, I absolutely enjoy flexibility as regards historical order and besides, the beautiful painting you have posted, Sun Raising through Vapour, still was an early one in Turner's career. On the other hand, what I am trying to do is show how he reached that stage at which he simplified his works from his rather academic beginnings to a minimum detail, making them virtually impressionist in their nature.
P.S. By the way, there is a greatly enlarged reproduction of Sun Raising through Vapour here.