I am trying to remember/find a book about a little girl who doesn’t have much, except her little treasures. I think it was a stick of chewing gum, a jack ball, and a few other small items. She lives in a brownstone and it seems like she hides her treasures behind a brick. She takes them out and looks at them often. The front of the cover had her and another person sitting on concrete steps with a railing. I don’t know if it was a little golden book or not. It seems like it was about 5X5 square, about 10 pages? I would have had it read to me around 1970ish. I can’t remember much else. I have looked everywhere for it, only being able to search by the memory of the cover.
If it is the same book I’m remembering, it might be The Hiding Place by Pauline Palmer Meek.