Hi Chempat, many thanks for the information on the Old Dyssean Society, it would appear from a line in their history that Miss Dixon was the Matron of 'Uplands', a large house in the 1920s on Walcot Road for boarders. Uplands in 1939 was used for schooling of evacuees. I have therefore written to the Old Dyssean Society to see if they have any further information.
I am a member of Find My Past and there is no house name or number, just Walcot Green.