Darcy & Colonel Fitzwilliam call at the parsonage the day after they arrived at Rosings. In fact, they return with Mr Collins who had gone to pay his respects. But after that initial courtesy call, it's a week before Elizabeth is again in company with Darcy. I had forgotten how his attraction to Elizabeth regained strength.

We read in Chapter 31:

Colonel Fitzwilliam's manners were very much admired at the Parsonage, and the ladies all felt that he must add considerably to the pleasure of their engagements at Rosings. It was some days, however, before they received any invitation thither ... it was ... almost a week after the gentlemen's arrival, that they were honoured by such an attention, ... . For the last week they had seen very little of either Lady Catherine or her daughter. Colonel Fitzwilliam had called at the parsonage more than once during the time, but Mr. Darcy they had only seen at church.