Original: Extensive correspondence exists between MÃ 1\/4 ller and Darwin, and MÃ 1\/4 ller also corresponded with Hermann MÃ 1\/4 ller, Alexander Agassiz, Ernst Krause and Ernst Haeckel.
Simplified: Extensive correspondence exists between MÃ 1\/4 ller and Darwin, and MÃ 1\/4 ller also corresponded with Alexander Agassiz, Ernst Krause, and Ernst Haeckel.