Charles Heidsieck
...that French Champagne merchant Charles Heidsieck was imprisoned for espionage during the American Civil War, sparking an international incident?
...that <a href="./France" id="mwChA" rel="mw:WikiLink" title="France">French</a> <a class="mw-redirect" href="./Champagne_(wine)" id="mwChE" rel="mw:WikiLink" title="Champagne (wine)">Champagne</a> merchant <b id="mwChI"><a href="./Charles_Heidsieck" id="mwChM" rel="mw:WikiLink" title="Charles Heidsieck">Charles Heidsieck</a></b> was imprisoned for <a href="./Espionage" id="mwChQ" rel="mw:WikiLink" title="Espionage">espionage</a> during the <a href="./American_Civil_War" id="mwChU" rel="mw:WikiLink" title="American Civil War">American Civil War</a>, sparking an international incident?