Mildred was the younger and only sister of Helen Keller. Their relationship did not start on a good note owing to jealousy on the part of Helen. Helen was jealous that her mother paid more attention to Mildred. However, with time, the two sisters developed a loving bond. Even without a proper language for communication, the two sisters hearts felt for each other. They had long walks together and often Mildred would explain the sceneries to Helen. Later, Mildred joined theCambridge Schoolwith Helen and the two sisters spent some memorable years there inNew York.Mildred was Helen Keller's only sister. Not much is mentioned about her apart for a few instances. Helen was initially jealous of her due to the attention she received from their mother. On one such occasion Helen dropped little Mildred out of the pram she was placed in since it belonged to her doll. Over the years the two sisters grew fond of each other and spent more time together. They would go on walks where Mildred would describe the things she saw using Helens unique sign language. They also went to Cambridge School together. When Helen finally learned to speak, the thought which cheered her the most was that he sister would at last be able to understand her.