"The houseboat is gone!" "Tom, what do you mean?" "I mean just what I say, Sam. The houseboat is gone-vanished, missing, disappeared, drifted away, stolen!" ejaculated Tom Rover, excitedly. "Tom, don't go on in such a crazy fashion. Do you mean to say the houseboat isn't where we left it?" "It is not, -and it is nowhere in sight on the river," returned Tom Rover. "Come, we must tell Dick and the others about this." "But we left the Dora in charge of that big planter last night," insisted the youngest of the Rover boys. "He said he would take good care of the craft." "Well, he is gone too. I hunted high and low for the houseboat, and for that planter, but without success.