She was quite right，the comfortable wonderful mother creature-and she had never been more so than when she said their“play actin’”would be their joy.Colin and Mary found it one of their most thrilling sources of entertainment.The idea of protecting themselves from suspicion had been unconsciously suggested to them first by the puzzled nurse and then by Dr.Craven himself.
“Your appetite.Is improving very much，Master Colin，”the nurse had said one day.“You used to eat nothing，and so many things disagreed with you.”
“Nothing disagrees with me now.”replied Colin，and then seeing the nurse looking at him curiously he suddenly remembered that perhaps he ought not to appear too well just yet.“At least things don’t so often disagree with me.It’s the fresh air.”
“Perhaps it is，”said the nurse，still looking at him with a mystified expression.“But I must talk to Dr.Craven about it.”
“How she stared at you！”said Mary when she went away.“As if she thought there must be something to find out.”
“I won’t have her finding out things，”said Colin.“No one must begin to find out yet.”
When Dr.Craven came that morning he seemed puzzled，also.He asked a number of questions，to Colin’s great annoyance.
“You stay out in the garden a great deal，”he suggested.“Where do you go？”
Colin put on his favorite air of dignified indifference to opinion.
“I will not let any one know where I go，”he answered.“I go to a place I like.Every one has orders to keep out of the way.I won’t be watched and stared at.You know that！”
“You seem to be out all day but I do not think it has done you harm-I do not think so.The nurse says that you eat much more than you have ever done before.”
“Perhaps，”said Colin，prompted by a sudden inspiration，“perhaps it is an unnatural appetite.”
“I do not think so，as your food seems to agree with you，”said Dr.Craven.“You are gaining flesh rapidly and your color is better.”
“Perhaps-perhaps I am bloated and feverish，”said Colin，assuming a discouraging air of gloom.“People who are not going to live are often-different.”