This map is made from the geometry found in the book A Brief History of the Towne of Sudbury in Massachusetts 1639 - 1939. See the image below. And it is layered on the 1856 Map of Middlesex County by Henry F. Walling.
The blue line represents Sudbury at its maximum extent. There were 3 grants that formed the town and several to individuals.
Hudson, Alfred S. History of Sudbury, Massachusetts 1638 - 1889. Town of Sudbury, 1889.
Notes on grants are in Chapter IV. Page 57.
A Brief History of the Towne of Sudbury in Massachusetts 1639 - 1939. Federal Writers Project of the Works Progress Administration in Massachusetts. Revised 1986. Reprinted by The Sudbury Historical Society, Inc. 1987. This book is available from The Sudbury Historical Society
See Also: The annals of Sudbury, Wayland, and Maynard, Middlesex County, Massachusetts