The Musgrave Ritual

Also known as El ritual de los Musgrave, Le Trésor des Musgraves, Le Rituel des Musgrave

Reginald Musgrave’s maître d’hôtel has disappeared! Called to the rescue, Sherlock Holmes goes immediately to his friend, to inspect the premises. He finds a stolen jewel in the new maître d’hôtel’s jacket, and in a drawer, the brief, enigmatic words: the “Musgrave Ritual”. Seeking to elucidate their meaning, which soon turns into a veritable treasure hunt, he is led to one of the characters who has dark confessions to make... (europafilmtreasures.eu)