Thanks for the reminder, I had forgotten that article. But note that B&G did two Vicksburg articles in the recent past. An article on the siege was authored by Winschell whereas the Champion Hill/Big Black River article was written by Bearss while Winschell did the driving tour.
Doug, The copy of Blue & Gray that you may want to pick up is Volume XVIII, Issue 5, "Campaign" 2001. Interestingly, the OoB Bearss provides on page 15 of this issue is almost the same as in his earlier book, but it also includes Bladwin's Brigade of M L Smith's Division (17th La, 29th La, 31st La, 4th Miss, 46th Miss and Tobin's Tenn Art.) which he places (apart from the 4th Miss) on the west bank of the Big Black River.
Ryan