Thoreau writes in his journal:
Going up the railroad, I see a male and female rusty grackle alight on an oak near me, the latter apparently a flaxen brown, with a black tail. She looks like a different species of bird. Wilson had heard only a tchuck from the grackle, but this male, who was courting his mate, broke into incipient warbles, like a bubble burst as soon as it came to the surface, it was so aerated. Its air would not be fixed long enough . . .
Liverpool, England. Nathaniel Hawthorne writes to Ticknor & Fields: