Harry Potter author Jk Rowling has donated a "substantial" but undisclosed amount to help set up a multiple sclerosis research base in Edinburgh, Scotland. Rowling, whose mother died of the disease, is determined the new project - which costs $4.4 million (GBP2.5 million) - will be a giant leap towards finding a cure. The writer, who is patron of the Multiple Sclerosis Society Of Scotland, says, "It means a great deal to me to be able to provide support for this much-needed centre. It is an exciting step forward."