Michael-
 
A couple of years ago I worked with a crew from the William & Mary
Center for Archaeological Research on a Phase III at the Civil War fort at
Gloucester Point, Virginia (right across the river from Yorktown).   We
excavated the remains of several "Sibley tents", which show up as a
curved band about 10 inches wide, forming a circle about 15 ft across.
Dozens of individual postholes could be isolated within this outer band
(we sectioned every one of 'em!), and several of the tents had a brick
fireplace/stove platform(?) in the center.
 
Incidentally, it was a Union camp (beer bottles from New Hampshire!).
 I have seen pictures of these structures in one of those big coffee-table
 books of Civil War photos, but I'm not sure which one.
 
For more details, try contacting WMCAR's director Don Linebaugh at
[log in to unmask]
 
John Eastman   [log in to unmask]