Interesting story about the original phone for The Samaritans: Taken from Here
"out of the blue, I got a wire inviting me to apply for St Stephen Walbrook, in the heart of the City of London. Interviewed by the Patrons, the Worshipful Company of Grocers, I told them of my crazy scheme. The decision of these successful men to appoint me, because they thought it was worth a try, gave me immense confidence.
All I had to do was stand drinks to my pals in Fleet Street to get all the publicity necessary if the idea was to work. The telephone number of the church turned out to be the one I'd planned to ask for, MAN 9000."

I remembered reading a version of this story in a very old Readers Digest, so was able to look it up online.