"Why can't you?"
"I—I just can't, that's all."
"But there must be a reason!"
"There is a reason."
"What?"
"Well ... to begin with ... it was never absolutely settled that I should go."
"But you told Severn to-night that you were going."
"Yes ... I thought I was going then."
"And you've changed your mind since?"
"Yes ... I suppose I have."