This report details the investigation undertaken by the Linnaean Society of New England into a sighting of a mysterious sea serpent near Cape Ann, Massachusetts. The report includes eyewitness accounts, sketches, and scientific analysis of the creature. This fascinating read offers a unique glimpse into the scientific curiosity of the 19th century and our enduring fascination with the unknown mysteries of the sea. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.