Concord (Ball's Hill), May 1, (Sunday) 1904 [May 1, 1904]
  Brilliantly clear with fresh and cool 
E. [east] wind. 
  Spent the forenoon on or near Ball's 
Hill rambling in the woods & walking about
the cabins. In P.M. sailed down to the 
big Bedford Swamp and explored it more
thoroughly than ever before. The water was
very high & the flooded wood-encircled marshes
very beautiful. There were few birds there, however
Skirted the shores of my own woods on the way back