4. 'But I have seen him eating sugar.'

'No; I don't think you have. He has no teeth and no jaws. He can't bite
anything. What he does is to wet the sugar with his mouth and melt it,
and then suck it up.'

5. 'Well, that is clever! I wonder how he found out how to do it. And I
know something else that he is clever at.'

6. 'What is it, Harry?' asked Dora.

'Something you can't do! He can walk on the ceiling.'

'You can't do it either,' said Dora.

'How does he hold on, mother? We can see one up there now! He walks
about as if he were on the table.'

[Illustration: Enlarged view of Fly's Foot.]

7. 'He has something like gum inside his feet, and, when he wants to
stand or walk upside down, he presses this out, and it helps him to
stick on. Here is another fly walking up the window-pane.'

'I have often seen flies on the window-pane.'

8. 'How wonderful it is! The glass, you see, is smooth and hard, and it
stands straight up. We could not go up a hill like that, could we?'

9. They watched him go up and down, counted his six legs, and saw that