If at first... try, try and try again. But some people go on beyond the point that most of us consider reasonable, seem never to know the meaning of the word failure, although they seem unlikely to taste success. Are they deceiving themselves? Are they really born failures - rather than stubborn triers? James Astor reports on Havergal Brian, a composer with a head full of symphonies; on Mrs Miriam Hargrave, refusing to accept defeat after 39 driving tests and passing at the 40th. And on singer Oriel Clair, refusing to accept a score of refusals.