Thank you so much Jim
That gives me a time-frame to work out who the lady from 1910-1920 is.
It also confirms that, hopefully, I am correct in who I think the other photos might be.
Did you happen to know if the girls in black, with the older lady, could be wearing mourning outfits? I'm guessing it's the children of Ralph Dawson Seddon and his wife, who both died around Dec 1880.
Thank you