The Hobbit, or, There and Back Again
[Dwalin] "What is our burglar doing for us? Since he has got an invisible ring, and ought to be a specially excellent performer now, I am beginning to think he might go through the front gate and spy things out a bit!"
Bilbo heard this – the dwarves were on the rocks just above the enclosure where he was sitting – and "Good Gracious!" he thought, "so that is what they are beginning to think, is it? It is always poor me that has to get them out of their difficulties, at least since the wizard left. Whatever am I going to do?" (11.27)
The most that can be said for the dwarves is this: they intended to pay Bilbo really handsomely for his services; they had brought him to do a nasty job for them, and they did not mind the poor little fellow doing it if he would; but they would have done their best to get him out of trouble, if he got into it, as they did in the case of the trolls at the beginning of their adventures before they had any particular reasons for being grateful to him. There it is: dwarves are not heroes, but calculating folk with a great idea of the value of money; some are tricky and treacherous and pretty bad lots; some are not, but are decent enough people like Thorin and Company, if you don't expect too much. (12.6)
They debated long on what was to be done, but they could think of no way of getting rid of Smaug – which had always been a weak point in their plans, as Bilbo felt inclined to point out. Then as is the nature of folk that are thoroughly perplexed, they began to grumble at the hobbit, blaming him for what had at first so pleased them: for bring away a cup and stirring up Smaug's wrath so soon. (12.33)