South Watuppa Pond, the Square Enclosure

Directly north of the east shore site in the previous  post is a square enclosure  with two openings.   The center wall is about 25 feet long, and the enclosure is about 75 feet across and  35 feet deep. The water is very shallow, and this structure would have been completely out of the water  before the pond was raised.  Although the square shape suggests a barn or boat house foundation, the walls of this enclosure have features suggesting it was built by Indians.  Here is a view from the water, showing the walls of the enclosure and its tall reeds, with the large turtle-shaped boulder from the previous post to the right.

Here's a satellite view from Bing Maps.

 And here's another view.  On the shore at the enclosure are two boulders which are not visible due to the tall reeds.  There seem to be submerged rocks at the ends of the walls, which fan out in faint semicircles.  Here are two views from   the water, the first taken in 2011, and the second on 7/1/2012 .

The center stone row has large, round boulders piled on smaller rocks in its center, and smaller stones at each end.  This is the center stone row, photographed from inside the enclosure.  The stone in the center is propped, with empty space below it.  Although it is not visible from this angle, another stone to the right of this one is also propped.  The sharp stone to the left in the photograph resembles a manitou.

The stone row on the south side of the enclosure  has a boulder resembling a turtle head placed on top of smaller rocks. The shore side of this enclosure is marshy, and if there was a fourth wall, it was probably removed by development.  The outer wall resembles the wall at the campsite in the previous post, since both have boulders piled on smaller rocks in their centers.

I  used to look at the gallery of walls at Larry Harrop's blog, and wonder if there was some symbolism in the different  motifs in wall construction, such as  manitous, open spaces, slanted and saddle rocks.  Since these sites were used by clans or families in the summer, perhaps the motifs were used to identify the site or its  users.  This is especially suggested by the turtle motifs in the large boulder and turtle head at this site.
      So what could be the purpose of the small enclosure? Since it   faces west over water, it may have been a burial ground.
     Here is a view looking into enclosure through the south opening, done in ink brush. The turtle head is to the extreme right, the propped rock to the left, and the semicircles invite the viewer to visit the cairns inside.