Mary Ellicott Arnold (April 23, 1876 – 1968) was an American social activist, teacher and writer best known for In the Land of the Grasshopper Song, the memoir she wrote with Mabel Reed (February 6, 1876 – December, 1962) on their experiences as Bureau of Indian Affairs employees, 1908–1909. In Reserve Mines, Nova Scotia, Arnold and Reed helped the mining community establish cooperative housing. Arnold conferred with Antigonish Movement elders Moses Coady and Father Jimmy and she and Reed lived among the miners.