Katherine Cuyler Wormald (also known as Sister Monica) was the youngest daughter of William Henry Wormald* and his wife (Mary) Katherine (or Catherine) Cuyler Armstrong. Miss K. Wormald of Cambridge, near East London, matriculated through the University of the Cape of Good Hope in 1900 and received training as a teacher. In 1908 she was systematically collecting the plants of her district and two years later presented plant specimens to the Albany Museum, Grahamstown.
Katherine was not married. In 1912 she joined the Community of the Resurrection (CR), an Anglican monastic order for women in Grahamstown. She became a novice the next year and a nun, known as Sister Monica, in 1921. She taught at several schools in Grahamstown and Port Elizabeth for a number of years before moving to St Peter's Diocesan School in Bulawayo, Southern Rhodesia (now Zimbabwe). She retired in 1949 and after staying with relatives in Cape Town for some time returned to Grahamstown to become Guest Mistress. Her special characteristics were her keen sense of humour, her friendliness and courtesy.
