I saw that. Actually I have a period photo of a sawmill crew at Cato, Mississippi, (Walthall/Marion County) most of the men shown are white and kin to me one way or another. There are about three blacks shown. Judghing from the few photos I have seen, I cannot verify mostly blacks were hired, at leat in that area. BTW My g-grandfather lost his leg in a lumber mill accident, it was buried on his land, it was the start of the family cemetery I now "own" and care for.
GP