What excuse did Mr Easton make to say goodbye to the young girl? answer the question with reference to hearts and hands story

Mr. Easton gave the excuse that Mr. Marshal wants to smoke therefore he must go with him as they were handcuffed. He said to her that it's his duties and orders because of which he must leave.

The story "Hearts and Hands" by Edgar Allen Poe deals with the theme of outer appearance with which most of the people judge others. The story ends with the conclusion that appearances may be deceptive which alters the real self of a man. Since Mr. Marshal had a dull face and was not attractive because of which the girl got convinced that he was the prisoner. On the other hand, Mr. Easton looked attractive for Miss Fairchild. She wished to build a further relation with Mr. Easton but failed in doing so. Mr. Easton didn't want his reality to be highlighted in front of her because of which he got off from the train.