Ruth Fielding in the Great Northwest

The gray dust, spurting from beneath the treads of the rapidly turning wheels, drifted across the country road to settle on the wayside hedges. The purring of the engine of Helen Cameron's car betrayed the fact that it was tuned to perfection. If there were any rough spots in the road being traveled, the shock absorbers took care of them.
"Dear me! I always do love to ride in Nell's car," said the plump and pretty girl who occupied more than her share of the rear seat. "Even if Tom isn't here to take care of it, it always is so comfy."
"Only one thing would suit you better, Heavy," declared the sharp-featured and sharp-tongued girl sitting next to Jennie Stone. "If only a motor could be connected to a rocking-chair-"