“Keep out of the way, little folks!” warned Bert.  “There’s room enough for you on your own side, and you might be hurt.”

“And you two be careful,” said Nan to Flossie and Freddie.  “Stay on your own side.”

The two small twins said they would do so.

“Now for a last coast!” cried Bert, when Tommy had been given a number of rides on the bob-sled.  “It’s time to go home to supper.”

“Maybe we can come out after supper,” said Nan.  “There’s going to be a lovely moon, and coasting by moonlight is fine.”

“Maybe we can,” Bert said.  “Come on, Tommy,” he called.  “This is our last coast before supper.”

“All right,” Tommy answered.  He had walked up the hill, pulling after him the sleds of Flossie and Freddie, who liked to have him help them in this way.

“Last coast, little ones!” Bert called to the small twins.  “Then it’s time to go home.”

“Whose turn is it to steer?” asked Charley Mason.

“Yours, I guess,” Bert answered.  “Tommy, you can sit right behind Charley and watch how he does it.  Then next time you come out on this hill we’ll let you steer.”

“Thanks!” exclaimed Tommy.  He had been anxious to take hold of the wheel himself, but he did not like to ask.

On the bob-sled the boys and girls took their seats.  Bert was on the back sled, to push off and ring the bell.

“All ready?” he called.

“All ready,” answered Charley.

Bert gave a push and the bob-sled started down hill.  On either side were other bob-sleds and single sleds, while farther off, to the right, were streams of smaller boys and girls.

Clang!  Clang! went the bell, as Bert rang it.

The bob-sled was about half-way down the hill when Nan, sitting next to Tommy, who was behind Charley, gave a cry.

“Oh, look!” Nan exclaimed.  “Flossie and Freddie!  They’re going to get right in our way!  Steer out, Charley!”

The little Bobbseys, in taking their last coast, had come too near the part of the hill where the big sleds were.

“Flossie!  Freddie!” cried Nan.  “Look out!  Steer away!”

But they did not seem able to do it.

“I guess we won’t run into them,” Charley said.  He was trying as hard as he could to keep to one side.

All at once the bob-sled struck a lump of ice, and the front sled jumped into the air.  Charley Mason was jarred so hard that he rolled off.  The bob-sled swayed from side to side when no one was steering it.

Then Flossie and Freddie, on their sleds, steered right over in the way of the bob-sled.  They could not help it, they said afterward, and that was probably true, for they did not know much about steering sleds.

“Oh!” cried Nan.  “We’ll run right over them.”

But Tommy Todd, who was sitting behind Charley, slid forward as the other boy rolled off, and now Tommy grasped the steering wheel with all his might.