In the spring of 1880 she went again to Paris, only to "feast on things artistic." A little later she was summoned to the palace at Soestdijk to instruct the Princess Henry of the Netherlands. In 1883 she served with many distinguished artists on the art jury of the International Exhibition at Amsterdam.
In 1884 she once more yielded to the attraction that Paris had for her, and there made a great advance in her painting. In 1885 she began to work in pastel, and one of her best portraits in this medium was that of the Princess (Queen) Wilhelmina, which was loaned by the Queen Regent for the exhibition of this artist's work in Amsterdam in 1890.
The Italian Government requested Miss Schwartze to paint her own portrait for the Uffizi Gallery. This was shown at the Paris Salon, 1889, and missed the gold medal by two votes. This portrait is thought by some good judges to equal that of Mme. Le Brun. The head with the interesting eyes, shaded by the hand which wards off the light, and the penetrating, observant look, are most impressive.
She has painted a portrait of Queen Emma, and sent to Berlin in 1902 a portrait of Wolmaran, a member of the Transvaal Government, which was esteemed a work of the first rank. She has painted several portraits of her mother, which would have made for her a reputation had she done no others. She has had many notable men and women among her sitters, and though not a robust woman, she works incessantly without filling all the commissions offered her.
