Greg, can we zoom in on those three structures along the Wheatfield road on the north end of the Wheatfield?
They do not appear on period maps, but I have long wondered if one of those structures was mentioned in an incident involving a Medal of Honor winner from the 6th Pennsylvania Reserves, per the following citation:
Mears, George W., Bloomsburg (Pennsylvania), Sergeant, Company A, 6th Pennsylvania Reserves. Gettysburg, Pa., 2 July 1863. Citation given: 16 February 1897. With five volunteers he gallantly charged on a number of the enemy's sharpshooters concealed in a log house, captured them, and brought them into the Union lines.
It so happens that the 6th Pennsylvania Reserves passed right by that location on July 3 during an attempt to capture a section of Confederate artillery posted on the little bluff near the northwestern edge of the Wheatfield. It is quite possible Confederate skirmishers occupied a dwelling (if it was there during the battle) at that spot, because they fell back in front of the 6th Pennsylvania Reserves, and gave timely warning for the section to withdraw. Incidentally, I have never found any identification for those two guns, but suspect Parker's Virginia battery. This was part of the same reconnaissance that soon fell upon the 15th Georgia further to the south, although the 6th Pennsylvania Reserves did not take part in that movement.