According to the laws of dueling at that period, d'Artagnan was at liberty to assist whom he pleased. While he was endeavoring to find out which of his companions stood in greatest need, he caught a glance from Athos. The glance was of sublime eloquence. Athos would have died rather than appeal for help; but he could look, and with that look ask assistance. D'Artagnan interpreted it; with a terrible bound he sprang to the side of Cahusac, crying, "To me, Monsieur Guardsman; I will slay you!"