"I ask for you to honor your pledge", the bowman went straight to the point. "To give a share of the treasure, so the people of Laketown can rebuild their lives", in reality, Bard had no idea that the King Under The Mountain was influenced by a malevolent force; a force that has left behind a curse being foretold by Durin's Folk for generations. 

Fili remembered Thorin's promise to Laketown from before: that he would give half of the treasure to them, and fulfill the town to be ten times as powerful as Dale had once been. Although, with his uncle now in this state, he really didn't want to say anything aloud. He feared that if he did so, the king's hand would be laid upon Kili again, not to mention, himself. In truth, the blonde would take the risk, then he remembered about Saeril. To keep the incident a secret, both of them can't say that they fell down. Otherwise, suspicion will arise for the she-elf...