She had not been quite sure, from her aunt's rather confused account of his engagements, whether he would come that night; it was almost a surprise to see him; and now she was sure of a pleasant evening.

从她姑妈对他的约会的相当混乱的描述来看， 她不太确定他那天晚上是否会来。 见到他几乎是一个惊喜； 现在她确信今晚会很愉快。