The Archduke Conference has come to an end, but Ehrenfest’s archducal family is still reeling from the troubles it brought. Rozemyne has one year before she must depart for the Sovereignty, and those in her service have an important choice to make.
He knows that Rozemyne has some way to secretly communicate with Ferdinand, but has no idea how and thus can’t check it.
And I strongly suspect that he’s more inspecting her letter to avoid Rozemyne accidentally giving anything away to the Ahrensbach nobles, who are sure to read the letter before passing it on to Ferdinand, rather than worry over what she might tell Ferdinand.
He knows that Rozemyne has some way to secretly communicate with Ferdinand, but has no idea how and thus can’t check it. And I strongly suspect that he’s more inspecting her letter to avoid Rozemyne accidentally giving anything away to the Ahrensbach nobles, who are sure to read the letter before passing it on to Ferdinand, rather than worry over what she might tell Ferdinand.