Good info. I was thinking that they looked like oyster mushroom, Pleurotus sp. , and the white spore print could indicate that. Their color, especially in the first pic, suggest that they might be "golden" oyster mushrooms that have gotten a bit old, since prime ones are quite yellow in color. Don't know what kind of shape your samples are in now, but if you wish to try them, cut a couple of small pieces that are still solid, fry them in a little oil and butter. Eat them and then check for reactions. Sorry, I'm flying in the dark here a little bit. don't really know how experienced you are with mushrooms. But, you did know enough to get a spore print.