When the narrator visited Connie to deliver her husband’s letter, she mistook him to be her husband, Jim Macpherson due to her old age and memory loss. She was looking forward to Jim returning home for Christmas. She felt this was the best Christmas present she could ever receive.
This was the best Christmas present in the world for Connie because Jim had mentioned in the letter that he would return home from the war on Christmas. She used to read that letter multiple times a day to feel her husband’s presence nearby. Hence, when the narrator told her how he found the letter, she was extremely happy and felt it was Jim who had come to visit her after a long time.