It is not known why Caroline Molesworth (1794 1872) began to make these detailed observations in the garden of her home in Cobham, Surrey. She was interested in botany, and when she moved with her widowed mother from London to Surrey in 1823, she undertook an almost daily survey of nineteen categories of information, which she maintained (with help in later years, as her health failed) until 1867. This 1880 publication, edited with a biographical introduction by the entomologist Eleanor Ormerod (1828 1901), summarises Molesworth's records for the period 1825 50. Ormerod explains the methods...