This is a childhood memory. A family friend, a lovely woman from Poland, make this cake. It was tall with several layers, possibly standard layers sliced horizontally, and there was rum. I don't know if it was in the batter or the icing, or both. The cake was very dark and very rich. Mrs. G. kept it in the refrigerator and sliced it very thinly to serve. When I was a young adult, I asked for the recipe and she declined to share it because she'd once given it to someone and it was a failure. That person accused her of sabotaging the recipe. From that story, I take it that the cake might be something more complex than a dump cake. (Though dump cakes have their place.) Anyway, every crumb was precious and I'd love to try my hand. Anyone?