The part that the narrator hints at in "The Summer of the Beautiful White Horse" is the disbelief or shock that he experiences upon seeing the horse.

Heading: The Narrator's Reaction

- The narrator is surprised and amazed when he sees the beautiful white horse.
- The horse's beauty takes him aback, and he cannot believe what he is seeing.
- The narrator's reaction is significant because it sets the tone for the rest of the story.

Heading: The Importance of the Horse

- The horse is a symbol of hope and beauty in a world that is often cruel and harsh.
- Its presence in the story represents the possibility of something good and pure in the midst of difficulty.
- The horse also serves as a catalyst for the narrator's growth and understanding of the world around him.

Heading: The Theme of Innocence

- The story explores the theme of innocence and the loss of it as one grows older.
- The narrator's initial reaction to the horse is one of childlike wonder and innocence.
- As the story progresses, he begins to understand the darker side of the world and the challenges that come with adulthood.

In conclusion, the part that the narrator hints at in "The Summer of the Beautiful White Horse" is his disbelief and shock upon seeing the horse. This reaction is significant because it sets the tone for the rest of the story and represents the possibility of something good and pure in the midst of difficulty. The story explores themes of innocence and the loss of it as one grows older, as the narrator begins to understand the darker side of the world and the challenges that come with adulthood.

This 'part' refers to the situation when the narrator saw Mourad with the white horse which he stole.