When she was back in London Fountaine set her African specimens. Subsequently, she went on expedition in the United States, Central America and the Caribbean. In Kingston, Jamaica she held a talk at the Kingston Naturalists' Club on "The sagacity of caterpillars".
Following her return to London, Fountaine organized her collection of African specimens.  She then embarked on expeditions in the United States, Central America, and the Caribbean. In Kingston, Jamaica, she gave a talk at the Kingston Naturalists' Club about "The intelligence of caterpillars".