The Mesmerist's Victim by Alexandre Dumas

Indifferent to everything since he had learnt of Andrea's going soon to the court, Gilbert had forgotten the excursion of Rousseau and his brother botanist on Sunday. He would have preferred to pass the day at his garret window, watching his idol.

Rousseau had not only taken special pains over his attire, but arrayed Gilbert in the best, though Therese had thought overalls and a smockfrock quite good enough to wander in the woods, picking up weeds.