Armitt published her first novel,
The Garden at Monkholme, in 1878. It was critically well received, with
The Westminster Review praising it as "a new departure in fiction" for its focus on characters who were unattractive and for Armitt's ability to make drama out of commonplace events. Similarly,
The Scottish Review admired it for Armitt's outstanding depiction of character. Her 1885 novel
In Shallow Waters was praised for its compelling depiction of the self-sacrificing protagonist, Henry Dilworth. An excerpt from this novel gives a sense of Armitt's dry,
Austenian style at its best: :"She did not admire clever girls, and was never enthusiastic in her praise of good ones—those at least, who were specially marked out as such by their parochial visitations and love of week-day services...She was inclined to insinuate that any one who made a very visible application of herself to heavenly things must be drawn thereto by a lack of earthly prosperity." Armitt also published poems, short stories, and essays including a brief life of
Mary Shelley. The poet
Robert Browning wrote that he was impressed by some of her poems. ==Old age==