I think it was listed that Helena talked to a Danish author ?
Princess Albert of saxe Altenberg lived in Russia at the Chinese palace at Oraienbaum (amongst other residences) even after her marriage and then in her widowhood.
She organised her and her sister in law Countess Carlow (morgantic wife of Duke George of Mecklenberg-Strelitz)'s passage (with the latters daughters and grandchildren) out of Odessa on a british warship and settled at Remplin a family property in Germany.Her surviving brother seems to have joined her there.