Thoreau writes in his journal:
No fog this morning . At early dawn, the windows being open, I hear a steady, breathing, cricket-like sound from the chip-bird (?), ushering in the day. Perhaps these mornings are the most memorable in the year,—after a sultry night and before a sultry day,—when, especially, the morning is the most glorious season of the day, when its coolness is most refreshing and you enjoy the glory of the summer gilded or silvered with dews, without the torrid summer’s sun or the obscuring haze. The sound of the crickets at dawn after these first sultry nights seems like the dreaming of the earth still continued into the daylight. I love that early twilight hour when the crickets still creak . . .