This section is from the book "The Gardener V1", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
The price you are getting for your Grapes is small, but they have been a drug in the market this season. Cut the mouldy berries out of the bunches as they appear; keep a little fire on the house, and give air in fine weather, and sell them as quick as you can, no matter how small the price, for you will lose them all unless you do so. You would probably get more for them in London than in Edinburgh, if they were fresh and good, but the distance they would have to travel is against them, seeing they are not very fresh.