one active spout, it would sink and not be seen again. When diving these Humpbacks started head first under the water, slowly the back until came into view, then the dorsal fin, the pelvis - only once did I see a Humpback draw the flukes out of the water, or this dive the back was "humped or rounded so that the part appearing above the surface had the form of an arc of a circle. When first appearing the animals would usually show with just the top of the head showing, disappear and in about thirty seconds rise again for another spout. On this second spout though the body was shown above the surface, the animal dove in the manner described above. Once twice I saw a whale blow three or even four times before taking the final "big dive", but twice was the usual number. The length of time under the surface varied considerably and I did not find this exactly by my watch, but it was from ten to twenty minutes. After nearly two hours of chasing first one, then another of these school