Shaggy manes are such good mushrooms! How convenient to have the freezing weather to preserve those Shaggy Manes in such great shape! I bet you make some good food with them!
I haven't found any this autumn, so I like seeing yours! I learned just this year that the black ink from the auto-digestion of the Shaggy Manes is actually good! So I am excited to try that out myself. When they turn black, it's not rot -- it's just how they spread their spores. Other mushrooms are a different story -- when they turn to liquid, that's bad news for eating, lol! Enjoy your mushroom foraging!