"What a solemn child you are," he complained. "It is impossible to play with you, because you always take one so seriously."
"I know," said Katharine, rousing herself and looking penitent. "I am so sorry! I am made that way, I think. It used to annoy Ted. I think it is because I never had any fun at home, or any one to play with, except Ted. And then I began to earn my living, and so I never had time to be frivolous at all. I suppose I am too old to begin, now."
"Much too old," smiled Paul.
A knock came at the outer door. Paul put her away from him almost roughly, and glanced with a disturbed look round the room.
"You had better stay here," he said shortly, "and keep quiet till I come back."
"Who is it?" asked Katharine, in some bewilderment.
"I don't know. You don't understand," was all he said; and he went out and spoke for a few minutes to a man on the landing.
"It was about a brief," he said on his return. He still frowned a little, and she felt, regretfully, that his genial mood had fled.
"Was that all? Wouldn't he come in?" she asked.