Numerous other philosophers and scientists, including Isaac Newton (1704), Erasmus Darwin (1790) and Wilhelm Wundt (1874) may have referred to synesthesia, or at least synesthesia-like mappings between colors and musical notes.
Many other philosophers and scientists, such as Isaac Newton (1704), Erasmus Darwin (1790), and Wilhelm Wundt (1874), might have discussed synesthesia, or at least a similar experience of color-sound connections.