Which lines in these excerpts from Jane Austen's Pride and Prejudice show that Mr. Bennet is keeping information about Mr. Bingley to himself to heighten the curiosity of Mrs. Bennet and his daughters?

1. "Design! Nonsense, how can you talk so! But it is very likely that he may fall in love with one of them, and therefore you must visit him as soon as he comes." ( "I see no occasion for that. You and the girls may go, or you may send them by themselves, which perhaps will be still better, for as you are as handsome as any of them, Mr. Bingley may like you the best of the party." )
   
2. "Impossible, Mr. Bennet, impossible, when I am not acquainted with him myself; how can you be so teasing?" ("I honour your circumspection. A fortnight's acquaintance is certainly very little. One cannot know what a man really is by the end of a fortnight. But if we do not venture somebody else will;) and after all, Mrs. Long and her nieces must stand their chance; and, therefore, as she will think it an act of kindness, (if you decline the office, I will take it on myself.") (The girls stared at their father. Mrs. Bennet said only, "Nonsense, nonsense!")
   
3. ( Not all that Mrs. Bennet, however, with the assistance of her five daughters, could ask on the subject, was sufficient to draw from her husband any satisfactory description of Mr. Bingley. They attacked him in various ways—with barefaced questions, ingenious suppositions, and distant surmises; but he eluded the skill of them all), and they were at last obliged to accept the second-hand intelligence of their neighbour, Lady Lucas.