Synaesthesia publications from between 1890 and 1899:

Phillips, D. E. (1896-97). Genesis of number-forms. American Journal of Psychology, 506-527.

Calkins, M. W. (1895). Synaesthesia. American Journal of Psychology, 7, 90-107.

Flournoy, T. (1893). Des phemomenes de synopsie. Paris: Alcan.

Philippe, J. (1893). L'audition coloree des aveugles. Revue Scientifique, 1, 806-809.

Beaunis, H., & Binet, A. (1892). Sur deux cas d;audition coloree. Revue Philosophique, 33, 448-461.

Millet, J. (1892). Audition coloree. Montpellier.

Stevens. (1892). Colors of letters. Popular Science Monthly, March.

Holden, E. S. (1891). Colour-associations with numerals etc. Nature, 44, 223-224.