First and foremost, these sketches/watercolors are excellent pieces of art work, and do convey the feeling of the battle. However, Belfoured's observations are absolutely correct. In the interest of accuracy, the sketches seemed to indicate 6 guns in action. Although the battery was armed with 6 guns, only 4 were placed on Blocher's Knoll (later named Barlow's Knoll) because that was about all the room that was available. The other two gun section was positioned further back near to the Almshouse on the edge of the town.
The second frame does not seem to relate to the fight on Blocher's Knoll, because no one did any sort of entrenching or digging at that time.
The report on the battle by Samuel Wilkeson (Bayard Wilkeson's Father) was published on the front page of the New York Times on July 6. It begins: “Who can write the history of a battle whose eyes are immovably fastened upon a central figure of transcendently absorbing interest — the dead body of an oldest born, crushed by a shell in a position where a battery should never have been sent, and abandoned to death in a building where surgeons dared not to stay?” He then proceeded to provide his readers with one of the more accurate newspaper accounts of the battle. As bitter as his beginning was, his ending was a very different tone. He wrote: “My pen is heavy. Oh, you dead, who at Gettysburg have baptized with your blood the second birth of Freedom in America, how you are to be envied! I rise from a grave whose wet clay I have passionately kissed, and I look up and see Christ spanning this battlefield with his feet and reaching fraternally and lovingly up to heaven. His right hand opens the gates of Paradise — with his left he beckons to these mutilated, bloody, swollen forms to ascend.” Take note of the concept of "second birth of freedom in America". Surely President Lincoln would have read the report in the New York Times. Some historians have suggested that this may have been the inspiration for the idea of a "new birth of freedom" in the Gettysburg Address.