To answer your question, yes Edward McDouall is my paternal ancestor which you and I are descended from.
Edward's son Samuel McDouall married twice, his first wife was Ellen Stone and I'm descended from that line and you are from the second marriage Eliza Towersey also known as Cooper and are from Ernest McDouall's line.
Pauline McDouall has made contact with me and she did mention you to me. I'm so glad that you have made contact if you still have Pauline's details ,she ,I know would love to hear from you.