Just following up on this thread, John Docherty (born Dougherty in Irish spelling) and Elizabeth Marshal are my g-g-grandparents.
From my investigations, I believe they had at least 7 children
Mary, b. Kirkintilloch
Elizabeth, b. Partick
Jane / Jeanie, b. Partick
John, b. Maryhill <- Your John, know in my family as "Uncle Jock"
James, b. Kingarth <- My g-grandfather
William Marshall, b. Kirkintilloch
Edward, b. Birdston
Elizabeth Marshall had at least 4 more children (Robert, Margaret, David and Daniel) with her first husband, Daniel Grewer or Grier who died young.
I believe the family moved around following John's work as a stonemason. Both John and Elizabeth were born in Ireland and moved to Scotland as children with the great famine around 1850.
My mother used to spend her summer holidays with your John's children :-)
I also understand your John was very active in the Salvation Army