[5] Excerpt from Mrs. Astor’s 400: She immediately went to Europe where it was reported that those vying for her hand included Lord Falconer (later the 10th Earl of Kintore who married American heiress Helen Zimmerman, formerly Duchess of Manchester), Count A. F. Cherep-Spiridovich (a younger officer in the army of the Tsar), Prince Mohammed Ali Hassan of Egypt, and Count Aubert de Sonis who came from Paris to New York on the same ship with the widow.

While the Count was in the lobby of the St. Regis Hotel waiting to present flowers and a proposal of marriage, she departed by a rear exit with Philip Van Valkenburgh, a prominent member of an old New York family (but, obviously in need of some of her money, she would soon come to find out).

[8] Her fourth and last husband was the Duke of Porto, Dom Afonso of Braganza (1865–1920), Infante of Portugal, whom she married morganatically on 26 September 1917 in Rome, and again in a civil ceremony on 23 November of that year in Madrid, under the name of Madame Nevada Stoody Hayes-Chapman.

Hayes traveled from Italy to Portugal with the body of her late husband, and arranged for its installation in the Braganza pantheon in the Monastery of São Vicente de Fora in Lisbon.

After the death of the King of Portugal Nevada petitioned the republican government – to no avail – to grant her all the royal family's funds as she considered herself its senior member.

She sailed to the U. S. in 1921 to have made a silver casket on a bronze base (weighing half a ton) in which to convey her late husband's body from Naples to Lisbon.

In 1935 the Duchess of Porto traveled on the Ile de France to New York where she reported that, having spent two months in Germany, she was "greatly impressed by Adolf Hitler."