Thoreau writes in his journal:
I see afar, more than one hundred rods distant, sailing on Hubbard’s meadow, on the smooth water in the morning sun, conspicuous, two male sheldrakes and apparently one female. They glide along, a rod or two apart in shallow water, alternately passing one another and from time to time plunging their heads in the water, but the female (whom only the glass reveals) almost alone diving. I think I saw one male drive the other back. One male with the female kept nearly together, a rod or two ahead of the other.
P.M.—To Fair Haven Pond by boat.
The morning of the 6th, when I found the skunk-cabbage out, it was so cold I suffered from numbed fingers, having left my gloves behind. Since April came in, however, you have needed gloves only in the morning.