“No, I guess it didn’t rain,” agreed Margy.  Then she cried:  “Oh, look, Mun Bun!  Our island’s getting awful little!  It only sticks out of the water hardly any now!  Look!”

Mun Bun turned and looked behind him.  As his sister had said, the island was very much smaller.

“What—­what makes it?” asked Margy.

“I—­I don’t know,” answered Mun Bun.  “But it is getting littler, just like when you keep on sucking a lollypop.”

And that is just what the island was doing.  What Margy and Mun Bun did not know was that the tide had turned, that it was rising, and that it would soon not only make their island much smaller, but would cover it from sight, leaving no island at all!

“Oh, the water’s getting deeper,” said Margy, as she took another step and found it coming over her little knees.  “What are we going to do, Mun Bun?”

“I—­I guess we must go back to the middle of the island and stay there,” said her brother.

“Oh, shall we ever get off?” Margy asked, and her voice sounded as though she might cry before long.  “I can’t ever wade to shore when the water is so deep.  What are we going to do?”

“We’ll call for Daddy!” said Mun Bun.

CHAPTER XVIII

THE MARSHMALLOW ROAST

When anything happened to Mun Bun or his sister Margy they always called for Daddy or Mother Bunker.  The other children did the same thing, though of course Margy and Mun Bun, being the youngest, naturally called the most, just as they were the ones who were most often in trouble that needed a father or a mother to straighten out.

“Our island’s getting terrible small,” said Margy; “and the water’s gettin’ deeper all around us.”

“Yes,” agreed Mun Bun, as he got in the middle of what was left of the circle of sand and looked about.  “The water is deep.  I guess I’d better call!”

“I’ll help you,” said Margy.

The two children stood in the center of the sandy island that was all the while getting smaller because the tide was rising and covering it, and they called: 

“Daddy!  Mother!  Daddy Bunker!  Come and get us!”

They called this way several times, and then waited for some one to come and get them.

If you want to imagine how Margy and Mun Bun looked, marooned as they were on an island in the middle of Clam River, with the tide rising, just get a big, clean stone and put it down in the middle of your bathtub.  If you try this you had better put a piece of paper under the stone, so it will not scratch the clean, white tub.

Then on the stone put two other little stones to stand for Margy and Mun Bun.  Now put the stopper in the tub and turn on the water.  You will see it begin to rise around the stone, and soon only a little of it will be left sticking out of the water.

“Daddy!  Mother!  Daddy Bunker!  Come and get us!”