I found a 8" thick log along a light rail line where they did a lot of trimming. There are locust trees there but the bark does not look like locust, not deeply furrowed. It has a lot of heartwood and little sapwood like BL or osage, or maybe mulberry. I am thinking it must be one of the three as I can't think of other heavy woods with mostly heartwood. I'm leaning toward mulberry. Before I bring it home I guess I'll split it on the spot and should be able to tell then by the heartwood color. Any of you ever use mystery wood?