Here is a selection of old AT maps. All freely available from web sources.
First from the Library of Congress we have
And then from the south.
For Virginia we have:
For Maryland
And for Pennsylvania from the Federal Register:
From Cumberland Valley AT Club
New Jersey next
From the NYT
From the Connecticut Walk Book
Mt Greylock in Massachusetts
For Vermont, how about this USDA-FS map
Next North is New Hampshire
And for Maine