Tom Swift and His House on Wheels by Victor Appleton

Though it was very early, one of the men about the Winthrop place was already astir, preparing to wash down the front porch with a hose. Tom, followed by Ned, strode up the front walk, and the man, staring at the big House on Wheels which had stopped at the front curb, looked in surprise at the two rather unkempt and disheveled early morning callers.

"I'm Mr. Swift," Tom explained, smiling at the man.