occasionally

As Danglars approached the disappointed lover, he cast on him a look of deep meaning, while Fernand, as he slowly paced behind the happy pair, who seemed, in their own unmixed content, to have entirely forgotten that such a being as himself existed, was pale and abstracted; occasionally, however, a deep flush would overspread his countenance, and a nervous contraction distort his features, while, with an agitated and restless gaze, he would glance in the direction of Marseilles, like one who either anticipated or foresaw some great and important event.

In his singular character the dual nature alternately asserted itself, and his extreme exactness and astuteness represented, as I have often thought, the reaction against the poetic and contemplative mood which occasionally predominated in him.

Anne, by dint of talking over her shoulder to the girls and occasionally passing a sop of civility to Billy--who grinned and chuckled and never could think of any reply until it was too late--contrived to enjoy the drive in spite of all.

“You mustn’t blame me if you don’t get on with him,” he said; “I know nothing more of him than I have learned from meeting him occasionally in the laboratory.