Look in Chapter 2 for the answer.
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From the text:
"Thorin and Company to Burglar Bilbo greeting!
For your hospitality our sincerest thanks, and for your offer of professional assistance our grateful acceptance. Terms: cash on delivery, up to and not exceeding one fourteenth of total profits (if any); all travelling expenses guaranteed in any event; funeral expenses to be defrayed by us or our representatives, if occasion arises and the matter is not otherwise arranged for.
"Thinking it unnecessary to disturb your esteemed repose, we have proceeded in advance to make requisite preparations, and shall await your respected person at the Green Dragon Inn, Bywater, at II a.m. sharp. Trusting that you will be punctual.
"We have the honour to remain
"Thorin & Co."