"I think I saw him slip away, back when they first collared us." Nori spoke up. 
"Well why didn't you say anything?!" snapped Thorin angrily at the other dwarf.
"Well, I thought he was with Dori!"
"Don't blame me!" Dori protested indignantly. "I'm tired of being the hobbit-sitter!"

The dwarf prince growled angrily. "Well, that's it then. Master Baggins saw his chance and he took it! He has thought of nothing but his armchair and his warm hearth since we first left! We won't be seeing 'our hobbit' again, he's long gone!"