Complex sentence: Successive summers were spent at "Chalke Cottage" where she regained her creativity and in 1914 wrote the historical novel "Poursuite joyeuse" which was also published in 1915 as "Little hearts".
Split into simpler sentences: Successive summers were spent at "Chalke Cottage". She began writing again and in 1914 wrote the historical novel "Poursuite joyeuse", which was published in 1915 as "Little hearts".