Thoreau writes in his journal:
house. Yarrow.
P.M.—To Clintonia Swamp and Pond . . .
Found a ground-robin’s nest, under a tuft of dry sedge which the winter had bent down, in sprout-land on the side of Heywood Peak, perfectly concealed, with two whitish eggs very thickly sprinkled with brown; made of coarse grass and weed stems and lined with a few hairs and stems of the mahogany moss . . .