Thoreau writes in his journal:
P.M.—To Gowing’s Swamp and Copan . . .
Seeing house-leek on several rocks in the fields and by roadside in the neighborhood of Brooks Clark’s, Farmer [Jacob Farmer] told me that it was the work of Joe Dudley, a simple fellow who lives at one of the Clarks; that, though half-witted, he knew more medicinal plants than almost anybody in the neighborhood . . .
A painted turtle beginning her hole for eggs at 4 P.M. . . .
River at 6 P.M., twelve and five eighths inches above summer level. To-night the toads ring loudly and generally, as do hylodes also, the thermometer being at 62 at 9 P.M. . . .
Cambridge, Mass. C.C. Felton sends a form letter to Thoreau (The Writings of Henry D. Thoreau (ucsb.edu); MS, Houghton Library, Harvard University, Cambridge, Mass.).