Excellent! Good work and my apologies, for I had completely overlooked that comment and will have some revisions to make. In that case, to answer your previous question about who ordered Barlow to the knoll, since Howard commanded all Union forces at Gettysburg at that moment, it must have been Howard, who at the very least we can infer gave his tacit approval of that move, even if Barlow had been the one to suggest it. It also means the acting Eleventh Corps commander, Schurz, was completely cut out of the loop (and off the hook) for that fateful decision. It's also curious, since I figure there was a delay of perhaps half an hour between the time Barlow's men first arrived near the Alms House and when they actually took possession of the knoll, which in the meantime was occupied by a portion of Doles' sharpshooter battalion (skirmishers). Howard adds that he left Barlow to complete his deployment around the knoll before riding off to the First Corps, passing in rear of Robinson's Second Division on Oak Ridge to meet with Wadsworth and then Doubleday.
By the way, it also means Howard left Cemetery Hill around 12:45 p.m. to accompany Barlow's division (by my calculation).