This portrait, derived from <a href="//commons.wikimedia.org/wiki/File:Charles_Von_H%C3%BCgel_(1903).pdf" title="File:Charles Von Hügel (1903).pdf"><i>Charles Von Hügel, April 25, 1795 - June 2, 1870 (1903)</i></a>, depicts Hügel, the father of the author Anatole von Hügel. The caption is "Charles Von Hügel (in fancy dress) <i>From a Painting by E. Sales. Vienna, 1814</i>". A note in the work states, "At the age of eighteen: taken in fancy dress on the occasion of the ball given at Vienna by <a href="//commons.wikimedia.org/w/index.php?title=Prince_Metternich&amp;action=edit&amp;redlink=1" class="new" title="Prince Metternich (page does not exist)">Prince Metternich</a>, the Chancellor of State, to celebrate the restoration of peace. From a painting in oils by E. Sales (? Vienna), 1814".
E. Sales
1814
A copy of the book held at New York Public Library, digitised by google and made available at the Internet Archive (archive.org) at this <a rel="nofollow" class="external text" href="https://archive.org/details/charlesvonhgela00hggoog">location</a>.