This is the first, less scientific, presentation of the research in which Dr. Lilly has been engaged for more than ten years- based on the belief that communication with an alien species is possible. Dr. Lilly states the case for the selection of the dolphin as one of the most appropriate animals for this type of investigation- based on the size of his brain, the pre-existing ""bilateral kindliness"" which obtains between man and this beast, and also on his capability for vocalizing. This is the account of his earlier experiments (1949 on) and then in 1958, the laboratory he established in St. Thomas, the loss of his first pupils, their replacements, his behavioural observations and his findings on their vocalization, mimicry and ""copying"" phenomena. A final chapter suggests the implications of this research for the science of the brain, evolutionary development, and intraspecies language, and recent news stories have alerted the general public to the Navy research program and the potential military usefulness of this dolphin... Primarily for the more scientifically disposed.