Not seeing Shirley, whose back was towards him, he advanced to greet his father.
"You told me to come up in five minutes," he said.

"I just wanted to say--" "Miss Green," said Ryder, Sr., addressing Shirley and ignoring whatever it was that the young man wanted to say, "this is my son Jefferson.

Jeff--this is Miss Green." Jefferson looked in the direction indicated and stood as if rooted to the floor.

He was so surprised that he was struck dumb.
Finally, recovering himself, he exclaimed: "Shirley!" "Yes, Shirley Green, the author," explained Ryder, Sr., not noticing the note of familiar recognition in his exclamation.
Shirley advanced, and holding out her hand to Jefferson, said demurely: "I am very pleased to meet you, Mr.Ryder." Then quickly, in an undertone, she added: "Be careful; don't betray me!" Jefferson was so astounded that he did not see the outstretched hand.

All he could do was to stand and stare first at her and then at his father.
"Why don't you shake hands with her ?" said Ryder, Sr.