Answer:
A secondary source of information is one that was created later by someone who did not experience first-hand or participate in the events or conditions that you're researching.
Explanation:
The author ends the story with Grace's recollection that Abraham Lincoln "seemed so very kind but looks so very sad" was to portray that to support the characterization of Lincoln as a great man who faced difficult situations. At this time, Lincoln, throughout the ends of his life, suffered "Great Depression" where people around him, always said that he was like a walking melancholy
Therefore, I would like to conclude by saying “Dreams don’t get true, they are MADE true!” The future belongs to those who believe in the beauty of their dreams. All in all, face your fears by achieving them!