Once the player has the evidence, the player may try to extort money out of Ailis McLafferty|Ailis. The player is going to need some serious Persuasion skills, but if they pull it off, they'll get 10,000 caps for it. Ailis will then warn the player never to mention anything about the ledger again. Of course, the player will have to give up the evidence, but since there are two ledgers in the game, the player has the option of being a real shit and turn over the additional evidence to Enzo or Fleming, anyways. If the player tries to use the second ledger on Ailis, she'll go ballistic and shoot the player, with her cronies backing her up.
If the player's skills are not quite up to par, she'll counter offer with 5,000 caps and tell the player to get out of town while he can still breathe. The player has 24 game hours to comply. If not, and Ailis and/or her men see the player, then they will attack the player. Once the battle is done, Major Fleming and his men will question the player and the player can tell about the ledger to save his bacon. Fleming will find the ledger on Ailis.