Your book The Field proved beyond doubt that all living things can and do communicate by thought with each other no matter where they are in the world. This explains why certain plants and organisms change or mutate at the same time worldwide. I remember when all the musk plants in the world simultaneously lost their scent; we also have bacteria and viruses which mutate to become immune to the latest drugs and antibiotics.

I also believe that the current violent behaviour - terrorism, road rage and the like - are due to thought waves transmitted via the Field and picked up by receptive individuals who then, via their own thought transmissions, influence others. This would account for crowd violence and riots, where normally inoffensive people are drawn into situations they would usually avoid.

The reason for this letter is to tell you about a new arthritis treatment. There is a plant I have learned about from one of my clients, David Cowles, a businessman who lives in Las Vegas. If you log on to www.nesgadol.com, you can download his essay on marsh pennywort (Hydrocotyle umbellata).

He is trying to find someone who will analyse the plant to discover its constituents because he has discovered that it has remarkable curative powers. He has cured himself of arthritis, gout, scleroderma, emphysema and Raynaud’s disease. It heals the kidneys, too.

His wife, who suffered from cystitis for 30 years - which no amount of expensive medical treatment had managed to cure - ate just two leaves of pennywort a day and, after five weeks, she was completely cured.

Finally, Russ Maslen, the author of the book Arthritis BC: Before Centella that I published, has discovered that he is suffering from pancreatic cancer. But because he has been eating Centella asiatica (gotu kola) leaves for the past 11 years, the tumour has stopped growing and is now about the size of a walnut.

His oncologist thinks he may have had this tumour all that time and - get this - Russ has foregone all forms of conventional therapy, has not lost weight and is still functioning normally. When I met him recently at his home in New South Wales, Australia, he was fit enough to take my son and me out and about to show us the sights. - Kenneth V. Jackson, Centella Probe (UK), via e-mail