Yeats spent a good deal of time at her home , the Chantry House in Steyning , Sussex , where she lived with her sister Nora Shackleton Heald .
Heald became his last mistress .
Yeats spent a good deal of time at Heald 's home , the Chantry House in Steyning , Sussex , where she lived with her sister Nora Shackleton Heald .
Heald became his last mistress .