I drew my daughter sitting in strong sunlight with fast shifting clouds. Using tonal pens I tried to capture lights and darks, but because of the clouds moving so fast, found I was adding more shadow in with the changing light that I should. As such the image I produced wan’t very successful, rather overworked and too dark in the face. However once I had given up, I happened to turn he paper over to find that the pen had bled through. The resulting reverse maintained many of the highlighted areas lost in the original and so I ended up with a better image that I thought! Serendipity!!!