Richard Garriott (known as Lord British in Ultima computer games) was born in Cambridge, England in 1961. Is the street address of his home at the time published anywhere? The best I could find is this tweet, but the address is not given:
Walked from the house I was born in to the home of Stephen Hawking in Cambridge today, to give him a copy of my book for his 75th birthday!
That suggests a possible range of locations, but I am looking for a street address.