Duchess of Marlborough egg
...that the Duchess of Marlborough egg is the only Fabergé egg to have been commissioned by an American?
...that the <b id="mwDMk"><a href="./Duchess_of_Marlborough_(Fabergé_egg)" id="mwDMo" rel="mw:WikiLink" title="Duchess of Marlborough (Fabergé egg)">Duchess of Marlborough egg</a></b> is the only <a href="./Fabergé_egg" id="mwDMs" rel="mw:WikiLink" title="Fabergé egg">Fabergé egg</a> to have been commissioned by an <a class="mw-disambig" href="./American" id="mwDMw" rel="mw:WikiLink" title="American">American</a>?