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Professor Amelia Rumford was an archaeologist and author of Bronze Age Burials in Gloucestershire. She helped the Fourth Doctor and Romana I defeat Cessair, who had been posing as Vivien Fay, her friend and assistant. (The Stones Of Blood)
Behind the scenes
While the character’s name is “Amelia Rumford” in Terrance Dicks’ novelisation of Doctor Who and the Stones of Blood and promotional material for its audiobook, it has been occasionally presented with the alternate spelling “Emilia Rumford” in certain production materials and promotional materials for the story.  The episode credits for The Stones of Blood refer to the character as simply “Professor Rumford,” leaving the canonical spelling unclear.