Mary's first supper at the blind school. On the food tray that Adam put on the table only a knife appears next to the plate and the next look at the tray a spoon appears next to the knife.
Just after Charles and Caroline visit Mary and are heading back to their hotel, we see Caroline standing just outside of the entrance on a rainy evening just as a stagecoach pulls away from the curb. We then see Charles inside with Caroline in bed. This is because this is reused footage from "To Live With Fear Part 2" when Charles leaves to go find work.
when Adam opens the braille book... the word braille is misspelled as "BPAILLE"
Caroline tells Mary that the blind school she'll be attending is in Iowa, yet as Mary's coach approaches the school, there are mountains in the background that are more common to California.