side very easily. And as Bunny was a sturdy chap he had no trouble about
this part.

The auto-van kept on moving and Bunny noticed that it was going up a
little hill in the driveway that went all the way around the house.

"I don't see what makes it go uphill all by itself," said Bunny to
himself, giving the steering wheel a little turn, as there was a curve
in the pathway just ahead of him. "If I were running _down_hill I'd know
what made it go--the same thing that makes my sled slide downhill in
Winter. But if this auto stood on the level I don't see what started it,
nor why it keeps on going _up_hill. Bunker Blue must have left the
brakes off."

Bunny looked at the handle brake and at the one worked by the foot
pedal. Both were off, for Bunker had released them when he left the car,
since it stood on a level bit of the driveway.

"But what makes it go?" asked Bunny again. Then, as he heard the low
grinding noise, he remembered the self-starter, which Bunker had spoken
of.

"I must have kicked the handle or touched it," thought Bunny, "and that
started the machine. I don't know how to stop it. I guess I'd
better--Oh, whee! There's a tree I'm going to smash into!" cried Bunny
Brown.

The thought of getting out of the way of the tree drove from Bunny's
mind, for the time being, every other thought. He must not hit the tree
which grew a little over the side of the driveway.