I wrote to Colin Harper at the time, as I have a letter from Anne Briggs from 1964, brief to say the least just saying that the offer of £4 10s was not enough as her friend Bert Jansch reckoned she was worth at least £5 and if that was O.K. then she'd come and sing at Colchester Folk Club. Her address was care of Colletts music shop.
I also sent him an amusing letter from Bert Jansch apologising for missing a gig.
I quote, "Dear Brian, I am terribly sorry I could not make it on Monday.I ran out of money and couldn't find anyone to borrow from, and I'm afraid I was in no condition to hitchhike, and there was also the problem of finding a guitar.Hoping this did not inconvenience you too much. Yours sincereley Bert Jansch"
Colin Harper wrote back thanking me for the info but Anne Briggs had pulled the plug on a biography tho' BJ had given the go ahead and he would be including the letter in it, I never got a complimentary copy tho'.