Goofs

As Carol leaves the gazebo after Edwina arrives, she has to run a good distance to get to the tree where the blue rag is kept, but when McBurney hears horses, he can see the front gate from the gazebo.

When Carol leaves the house to find McBurney, she spots him in the gazebo playing cards. He is laying out the cards with his right hand, but when the camera angle changes to show Carol arrive, he is laying out the cards with his left hand.

When his character is introduced McBurney claims to be a Quaker, but then later he pours himself some wine. Quakers do not drink alcohol.

Obviously, McBurney is lying to Martha when he tells her that he was a Quaker in order to curry favor with her; he also tells her that he did not carry a weapon and worked as a medic, yet we see flashbacks of him ambushing enemy soldiers and gunning them down in cold blood.

In the opening scene, Amy doesn't actually pick the mushrooms, she just gathers up previously picked (and very clean) fungi by their cups. To pick a mushroom in the wild one must grasp it at the bottom of the stem or use a knife. Picking a mushroom by grasping the cup would break it in two.

The turtle bounces like it's made of rubber.

The mushrooms that Amy gathers are Portobello mushrooms. These are a species that grow in open fields and lawns, not in shaded woodlands.

When McBurney is playing cards, the deck has both the symbols (hearts, spades, etc.) and the number in the corner. Numbers were not printed on cards until 1864 and it was extremely rare to see a deck with them until 20-30 years after the war.

Edwina sings a couple of lines from the gospel song "In the Garden", which wasn't written until 1912, more than 50 years after the time period of the story.