He was not a wordy thinker, and this explosive phrase stood for mixed impressions which eloquent interpreters might have expanded into some sentences full of an irritated sense that he was being mystified, and a determination that this girl should not make a fool of him. 
He was not a wordy thinker, and this explosive phrase stood for mixed impressions: that he was being mystified, and was determined that this girl should not make a fool of him. 