Can anyone help me identify this lumber?

I'm thinking Mulberry, too.

I'm backing off the Mulberry guess. All the Mulberry I've seen turns russett red after a short exposure to air/sunlight. I'm not familiar enough with Locust to know.

I do have a small Mulberry log about the size of those pictured and the bark looks right but not the color if it has been exposed for any length of time.

I'll wait to see what Phinds says after receiving a sample. (BTW, Phinds. I reference your site OFTEN)