While visiting London recently, I  went sketching  with friends at Marble Hill Park, on the Thames, near Richmond.

One of my friends brought along some prepared papers, painted with home-made pigment, extracted from  Rose Willow Herb.

As often happens, I misjudged the proportions of my sketch and cut the top off the roof. Which is why I added a second piece of paper to get it all in!

I really enjoyed working on the pre-painted paper. It was a very good mid tone, as well as a fortuitous choice of colour and was easy to work over.

Suffice to say, a good time was had by all!