Church Pool Askham, oil painting: first stage

Here’s the first stage of my little oil painting on daler board of the Church Pool Askham, on the river there. I’ve painted it over two daler boards, so the image will read over two surfaces when presented. I’m showing it as one image as the painting develops. Each daler board is A3 size. I’m laying down the underpainting colours to indicate the colours of stone and brackish water.