By Penny:
It seems that in the early days of this case, the recovered Grand Duchess was named as both Anastasia and Tatiana.
The word that she was Tatiana penetrated the upper level of society, and I remember that one of the early visitors (Zena Tolstoy?) came thinking she was Tatiana, and announced -- on seeing the length of the person on the bed -- that she was "too short" to be Tatiana.
On another occasion, Princess Martha of Sweden drove to hospital to see the patient. She had known the Grand Duchesses in childhood, and is in several well-known photographs with them; she was closest in age to Maria and Anastasia. On arriving at the hospital, she saw the patient strolling outside and exclaimed that this woman was not Tatiana, but was rather most definitely Anastasia.
Princess Martha's escort was surprised, because no-one had thought to clarify to the Princess that it was Anastasia that they were trying to identify, and that no claim had ever been made that she was Tatiana.