What did the comteeses son left feeling after he meets lord blakeney

The Comtesse's son challenges Blakeney to a duel. He felt that Blakeney had insulted him with his insolence.

What the Vicomte thought and felt at that moment, when that long-limbed Englishman treated him with such marked insolence, might fill volumes of sound reflections. . . . What he said resolved itself into a single articulate word, for all the others were choked in his throat by his surging wrath—
“A duel, Monsieur,” he stammered.