 M. A. Courtney is perhaps best known for her book "Cornish Feasts and Folk-Lore" (1890), a detailed description of many of the traditions and folklore present in west Cornwall.It has also appeared under the title "Folklore and Legends of Cornwall".Other titles by Courtney included "Cornish Feasts and Feasten Times" (1910) and "Glossary of Words in Use in Cornwall" (1880, co-authored with Dr. Thomas Quiller Couch).