On the top of “Hedgehope,” the round-headed hill that is neighbour to Cheviot, there is a hollow in an incised stone, known as the “Bluidy Trough,” on account of the colour given to the water by the orange-red moss or lichen covering the stone. It is lucky to make a wish here, and drop in a crooked pin – a great number can be seen clearly, lying at the bottom of the hollow, in the water.
- Contributed by Mr T--, Belford, Northumberland, estate agent.
This from the Northumberland ‘County Folk-Lore’, collected by M.C. Balfour (1904). Perhaps the colour might be down to that red coloured algae you get in bird baths sometimes?