Final answer:
The excerpts provided do not directly address the specifics of how the gentleman on horseback reacts to Miss Grey, the governess, and her pupils' behavior; thus, the question cannot be conclusively answered from the provided text.
Step-by-step explanation:
The text provided does not contain a direct answer to the question of how the gentleman on horseback reacted to Miss Grey, as a governess, and her pupils' behavior. This indicates that the source passages do not align with the specific question asked about Miss Grey and the actions of a gentleman on horseback. However, based on various character interactions and attitudes presented in the excerpts, it's possible to infer that reactions to social situations and behaviors differ across different scenarios and contexts according to the characters' perceptions and societal norms.