George Stubbs' is one of the geniuses of 18th century British art. He is best known and loved for his paintings of horses, and his skilful portrayal of these wonderful creatures owes more to his early training in anatomy than to any formal art education.
Whistlejacket is one of the largest paintings in the National Gallery and one that is loved by many - not just horsey people! It really is very captivating and my favourite Stubbs.
You can't feel them in the picture, but he's wearing metal horse shoes to protect his hooves when trotting on hard surfaces.
* Horse trotting
Go back to the horse's mane. Move along his back and then feel over his barrel-round body. Have you noticed that Whistlejacket doesn't have a rider in a saddle in this painting?
His most famous win was at York in 1759, a race four miles long with prize money of 2,000 guineas.
We're amongst the crowds gathered in the stands and the horses are excited and ready to go"¦
* Horse race commentary
This painting belongs to Her Majesty the Queen and shows four soldiers from the Army of her ancestor George IV, who was a man of great, if somewhat exuberant taste and was obsessed by the importance of magnificent uniforms.
A handsome mounted sergeant fills more than half the left hand side of the picture.
The scene is set in a generalised landscape, possibly the Sussex Downs. It appears to be late summer and a suitably dark warlike sky broods over the participants.