sentences:  These events plunged Ruskin into despair and led to increasingly severe bouts of mental illness involving a number of breakdowns and delirious visions.The first of these had occurred in 1871 at Matlock, Derbyshire, a town and a county that he knew from his boyhood travels, whose flora, fauna, and minerals helped to form and reinforce his appreciation and understanding of nature.Ruskin turned to spiritualism.