Coot Club
Dick and Dot have to be taught the art of sailing, because they are spending their first holiday afloat with Mrs. Barrable. On hand is the doctor's son, Tom, and a pair of twins that are such expert sailors they are nicknamed Port and Starboard. The adventure begins with the "Hullabaloos," a party of noisy holidaymakers on the river who are damaging the riverbanks and wildlife. Tom is forced to free their boat from its mooring to save a coot's nest. Then, Tom, Dick and Dot, joined later by the twins, sail south on a cruise. Will the Hullabaloos catch up with them?