Columbia subject headings:
Bonaparte, Mathilde-Lætitia-Wilhelmine, princesse, 1820-1904--Correspondence.
Hébert, Ernest, 1817-1908--Correspondence.
Harvard subject headings:
Bonaparte, Mathilde-Lætitia-Wilhelmine, princesse, 1820-1904--Correspondence.
Hébert, Ernest, 1817-1908--Correspondence.
Princeton subject headings:
Bonaparte, Mathilde-Lætitia-Wilhelmine, princesse, 1820-1904--Correspondence.
Hébert, Ernest, 1817-1908--Correspondence.