Sarah Williams (1837–1868) was an English poet, most famous as the author of "The Old Astronomer", also known as "The Old Astronomer to His Pupil".A segment of her poem is used in the introduction to Ian Rankin's novel Set in Darkness.Though my soul may set in darkness,it will rise in perfect light.I have loved the stars too fondlyto be fearful of the night.The line "I have loved the stars too fondly to be fearful of the night" has often been incorrectly attributed to Galileo.