I'm still trying to get my head around how this works, but I'm trying. Talking out loud.
Have copies of Pears' Christmas Annuals for 1918, 1920, 1921, 1923. They make for a good collection of adverts. Not forgetting Punch July 1916 - Dec 1917.
If I find a page that would be helped by what I find, I will add if possible.
I would like to add a new section to the Cash's page !!!! - need to work it out in Sandbox first....... done !!!