Annie Walker was the second woman employed in Britain as a professional observational astronomer. The first was Caroline Herschel. Annie worked at Cambridge Observatory from 1879 to 1903, largely observing with and reducing data from the transit circle, contributing to the Cambridge Zone of the Astronomische Gesellschaft catalogues. She was appointed under Observatory Director John Couch Adams, and her position was terminated under Director Sir Robert Stawell Ball. The only publication in which she is identified by name is the Appendix to the 1919 Cambridge Zone Astrographic Catalogue, published by then Director Arthur Stanley Eddington. Following practice of the time, the volume authorship is “University of Cambridge. Observatory.” While Annie is regularly mentioned in the Cambridge Observatory Annual Reports, the only public article about her is Hutchins and Hurn (2025). These two sources are the basis for this article