'I've seen a picture.' He hurried away.

A hasty dash and scramble among the papers on father's study table yielded, as the sum-books say, 'the desired result'.

But when he came back into the room holding out a paper, and crying, 'I say, look here,' the others all said 'Hush!' and he hushed obediently and instantly, for the bird was speaking.
'Which of you,' it was saying, 'put the egg into the fire ?' 'He did,' said three voices, and three fingers pointed at Robert.
The bird bowed; at least it was more like that than anything else.
'I am your grateful debtor,' it said with a high-bred air.
The children were all choking with wonder and curiosity--all except Robert.

He held the paper in his hand, and he KNEW.

He said so.