Manuscript map.
Relief shown pictorially and by spot heights.
Oriented with north toward the upper left.
"This is the plott of Deer Island and contains 208 acres ye whole."
"Copied from a plan in the Selectmen's office in Boston May 25th 1816 by me William Taylor. Supposed to have been surveyed one hundred years past [mem] the courses & distances not on the original but marked on by me W T."
"...the red lines show the form of the Island agreable to the above survey. [Supposing] about 100 years past - & allow the variation of the needle to be then 9 degrees west & at present 5 degrees."