Two small boys learn to row and then to sail with an expert old sea captain as their guide and teacher. Aboard the Mud Hen which they helped to renovate and transform from a rowboat to a sailboat, the boys cope with problems of maneuver, wind and sea. Their instruction and experiences told in story form are meant to instruct the novice sailor in his craft. Diagrams and illustrations by Bob Smith clarify this basic information set forth by these authors, expert sailors themselves. We admire the confidence of the instructor, but we question his wisdom in allowing the boys to sail after a few lessons, unprotected by life preservers.