'Prayers Written At Vailima, and A Lowden Sabbath Morn' is a collection of Sabbath prayers by Robert Louis Stevenson. The book contains prayers for various occasions such as grace, success, family, and friends. There are also prayers for self-reflection, renewal of joy, and self-blame. Written during Stevenson's time in Samoa, these prayers offer a glimpse into the author's spiritual life and provide comfort and guidance for readers seeking to deepen their own faith.