Radio Programme “I was Douglas Adams’ Flatmate”
This is an interview with Jon Canter (comedy writer), who was at college with Douglas, and then shared flats with him for 3 or 4 years. During this time, Douglas wrote “Hitch-hiker’s Guide to the Galaxy”.
http://www.bbc.co.uk/programmes/b00fzblz
Also in an interview with the Independent:
“We weren’t close friends at university. We became friends later and that was to do with this house we rented in London – in Arlington Avenue, Islington – which is immortalised in The Hitchhiker’s Guide to the Galaxy. The phone number of that house is in the book as 2 to the power of 267,709, and the phone number there was 226 7709, hilariously. That was a little coded message for all of us who lived in the house, as he used to come and sleep on the floor when he was script-editing Doctor Who and when he was working on the radio series of Hitchhiker, which is when we became friends.”