218 
BULLETIN OF THE NATURAL HISTORY SOCIETY. 
boulders for a long time in the future, since, although they will 
become more or less buried, the compass directions of the lines, 
(as shown on the diagram), and the regular distances apart of 
the posts, (somewhat under fourteen feet from center to center), 
will permit the positions of all to be determined when any one 
of them is once found. It should, however, be remembered 
that while my measurements were taken from the nearest edges 
of the posts to the shore, the stones are in the centres of the 
posts, which will make a difference of a few inches wdien the 
stones are used. While thus marking the posts I was able to 
locate the position of those designated ‘‘missing” on the earlier 
diagram, and accordingly they are added upon that accompanying 
this note. 
