Her brothers John H. and Horatio Mintorn, the authors of Hand-Book for Modelling Wax Flowers (1844), ran a business in London which sold supplies and kits.
[5] In 1879, Mogridge (together with various family members[d]) started to create wax models for the British Museum's natural history department, at the suggestion of either Richard Bowdler Sharpe or Albert Günther.
[14][15] Mogridge and Mintorn initially spent three years there, creating insects and plants for dioramas illustrating birds and mammals.
[14] Mogridge and Mintorn also worked on the Jesup collection at the American Museum of Natural History until 1892, making models to show the destructive effects of insects on timber.
[5][6] In 1892–93, Mogridge and Mintorn went to Washington where they made botanical models for the US government,[6] including illustrations of insect spoilage of food crops.
[5] In 1896 she was working on bird exhibits for the George Walter Vincent Smith Art Museum at Springfield, Massachusetts.
[13] Mogridge is described as "without a rival" in making flower models for museums in an 1887 article in the British journal Nature.
[17] Her work with Horatio Mintorn for American museums received considerable publicity in the press in the United States.
One contemporary review in the Bulletin of the Torrey Botanical Club describes the settings as of interest to the botanist, because they are reproduced sufficiently accurately as to show the individual plant species present.