Schleicher, August, Ernst Heinrich Philipp August Haeckel and W. H. I. Bleek ((1983). [1863, 1865, 1867]). Linguistics and Evolutionary Theory: Three Essays. With an introduction by J. Peter Maher. Philadelphia, J. Benjamins. Three essays by Schleicher, Bleek and Haeckel protray the early reactions in linguistics to the ideas of Darwin.