Wheal Alice engine house

It's been a glorious day. I went out in search of three sisters but found only one: Wheal Alice engine house of Three Sisters Mine. I parked at Trencrom and found Wheal Alice easily. Then I walked the half mile or so to the field where the OS map names the remains of Wheal Kitty. However, it was very overgrown. So I continued in search of Wheal Mary at Brunnion Farm but there is no remaining engine house. Getting a bit tired, I made my way back to the car. My extra shows a view across a meadow near Trencrom with Castle An Dinas hill distant.