Answer:
The summary of the excerpt "The Closing In" starts off when one of the two brothers was captured by Utes when the other was also captured after trying to let go of their brother. The chief then made a deal for the brother that could walk across a series of obstacles carrying his brother on his back, then they would be set free. They succeeded and the chief kept to their word. This story can be referenced to the Kiowas when surrendering to the United States government and doing a series of ridiculous stuff as their punishment.
The summary of the excerpt "Rainy Mountain Cemetery" describes mainly the prologue, the preface, and the introduction of the story. It basically tells about the meteor shower that happened in late 1833 which happens to be one of the earliest moments of the Kiowa calendar. Four years later, the Kiowas made the first of their treaties with the US where it points out the golden age of the Kiowa era. The Kiowas were embodied in Kosahn, a centenarian wondered by the author what she excepts to dream for in the aftermath of the sun, the plains, and finally, silence.