Mourt's Relation was written between November 1620 and November 1621, and it gives a detailed descriptionof what happened from the landing of the Mayflower Pilgrims on Cape Cod in Provincetown Harbor through their exploring and eventual settling of Plymouth Colony. It was written primarily by Edward Winslow, although William Bradford appears to have written most of the first section. The book describes their relations with the surrounding Native Americans, up to what is commonly called the first Thanksgiving and the arrival of the ship Fortune in November 1621.