As part of the ensuing peace treaty, Graustark agreed to pay a large indemnity to Axphain, to be due, with interest, in fifteen years.
Graustark found itself without the resources to pay the indemnity when it was due, and in desperation, Princess Yetive, Ganlook's daughter and successor, was on the verge of contracting a state marriage to Prince Lorenz of Axphain in exchange for more favorable payment terms.
During Gabriel's imprisonment, Dawsbergen was ruled by his younger half-brother, Prince Dantan, a popular figure among his own people and a staunch friend of Graustark as well.
Yetive and her husband were tragically killed in a railway accident near Brussels, leaving their young son Prince Robin as ruler of Graustark.
While still a child, Robin was the target of an assassination plot by anarchists acting under the direction of the exiled Count Marlanx, whose ultimate goal was to establish himself as sole dictator of Graustark.
Hubert was hoping to marry Princess Virginia of Dawsbergen, Bevra's younger sister, but she had previously contracted a marriage of convenience to Pendennis Yorke, an American journalist, and much to the surprise of everyone it became a genuine love match.
The communist regime in Axphain was defeated after an unsuccessful attempt to invade Graustark, and the monarchy in that country was restored with Gregory on the throne rather than the unpopular Hubert, who was himself assassinated in the aftermath.
In the fantasy novel Three Hearts and Three Lions (1961) by Poul Anderson, the hero Holger Carlsen gives his hastily constructed alias as 'Sir Rupert of Graustark.'