With Dagger and Poison or The Curse of Gold (1912)

Count von Löwenstein shows Marquis Al Fresco his will, where he bequeaths 1 billion to his daughter Donna Elvira, if she marries the Marquis. The evil Marquis visits Saïd Ali Mohammed, Doctor of Toxicology, where he buys a bottle of poison. When the Count and the Marquis walk through a wood, two robbers kill them. The robbers find the bottle, drink the poison and die.