How did mr and mrs Lucas react to collin's proposal?

From the text:

Sir William and Lady Lucas were speedily applied to for their consent; and it was bestowed with a most joyful alacrity. Mr. Collins's present circumstances made it a most eligible match for their daughter, to whom they could give little fortune; and his prospects of future wealth were exceedingly fair. Lady Lucas began directly to calculate, with more interest than the matter had ever excited before, how many years longer Mr. Bennet was likely to live; and Sir William gave it as his decided opinion, that whenever Mr. Collins should be in possession of the Longbourn estate, it would be highly expedient that both he and his wife should make their appearance at St. James's.